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Neil deGrasse Tyson: The Harsh Truth About Horoscopes (sorry but it’s true)

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Neil deGrasse Tyson: The Harsh Truth About Horoscopes (sorry but it’s true)

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3228 segments

0:00

Surveys find that roughly 80% of Gen Z

0:02

believe in astrology and many allow it

0:04

to influence major life decisions.

0:06

>> But what would be sad is if that number

0:08

got to 100%. Then the civilization just

0:10

goes back to the cave where everything

0:12

that happened in the natural world was

0:14

created by forces beyond our knowledge

0:16

and understanding. So if you want to

0:18

think you're not in control of your fate

0:19

because the sun, moon, and planets are.

0:21

It's a free country. But I'm creating

0:23

meaning in my life cuz I can control

0:25

that. But is there anything that the

0:27

universe does to influence us?

0:30

>> Yes.

0:31

>> Really?

0:31

>> Yeah. And I'll tell you how. You ready?

0:33

>> Neil deGrasse Tyson is one of the most

0:35

recognizable voices in modern science

0:37

>> who turns the mysteries of the universe

0:39

into simple truths

0:40

>> and simple truths into life lessons.

0:42

>> As a scientist, it's disturbing how

0:44

easily people divide each other based on

0:46

skin color, religion, what food you eat,

0:48

what language they speak, and then they

0:49

find some other philosophy that differs,

0:51

and then they go to war. But when I step

0:52

back with a cosmic perspective, you

0:54

realize how ridiculous it is.

0:56

>> Give me the cosmic perspective.

0:57

>> Well, there's nothing that we can put on

0:59

the table that can rival the

1:00

measurements of the universe. And we are

1:02

literally composed of stardust. So when

1:04

people think they're different, they

1:05

have DNA in common with all of the life

1:07

forms on Earth. Like you have 20%

1:09

identical genes to a banana.

1:11

>> Excuse me.

1:13

>> Okay, we all do, not just you. And

1:14

that's not there are molecules that went

1:16

in and out of your lungs that are in

1:18

China being breathed by people there.

1:19

And go further back. Jesus inhaled them.

1:21

So, how's that the oneness with others?

1:23

>> That can't be true.

1:24

>> And that's the next problem. People

1:26

value what they think is true more than

1:29

what is true. That's a recipe for the

1:31

unraveling of civilization as we know

1:33

it. But as a scientist, show me the

1:34

data.

1:35

>> And as someone that knows so much about

1:36

the universe and objective truth, I've

1:38

got a lot of questions. So, what do you

1:40

think is the probability of me getting

1:41

to another planet in my lifetime? And

1:43

then, could you make the case that the

1:44

universe is simulated by some sort of

1:46

advanced life form? And also, did humans

1:48

evolve at some point to believe? And you

1:50

think you would be happier if you

1:52

believed in God.

1:52

>> Oh, so you're going to spice us up a

1:54

bit. Okay. So,

1:58

>> I see messages all the time in the

2:00

comments section that some of you didn't

2:01

realize you didn't subscribe. So, if you

2:03

could do me a favor and double check if

2:05

you're a subscriber to this channel,

2:06

that would be tremendously appreciated.

2:08

It's the simple, it's the free thing

2:09

that anybody that watches the show

2:11

frequently can do to help us here to

2:13

keep everything going in this show in

2:14

the trajectory it's on. So, please do

2:16

double check if you've subscribed and uh

2:18

thank you so much because in a strange

2:19

way you are you're part of our history

2:22

and you're on this journey with us and I

2:23

appreciate you for that. So, yeah, thank

2:25

you.

2:27

[Music]

2:29

>> I've been watching a lot of videos of

2:30

yours I think because I've reached the

2:32

stage in my life where I've become

2:34

really existentially curious. I think we

2:36

all do at some point and especially the

2:40

more you've lived the more it all sort

2:43

of you ask what does it all mean? How

2:45

does it all come together?

2:47

>> What will it mean in to me in 5 years 10

2:50

years?

2:51

>> Uh I don't know if you're old enough to

2:53

think about your mortality.

2:55

Uh but that's a thing when you have

2:58

fewer years left than the years you've

3:00

lived and and you can I think the way

3:05

they say it is there's you can have a

3:07

good expectation to live as long as your

3:09

parents did. I lost both of them in the

3:11

last 5 years. So so that's my horizon.

3:17

And the fact that we die

3:22

has a capacity to bring focus into the

3:26

remaining time you're alive.

3:28

Cuz think about it. If knowing you're

3:30

going to die

3:32

brings focus and purpose

3:36

and resolve

3:38

and action,

3:40

then if you lived forever, what's your

3:43

hurry? For me, knowing I'm going to die

3:47

gives meaning

3:49

to my remaining life. Whereas, if I'm

3:52

never going to die, then mathematically

3:55

that would mean I'd lead a life of no

3:57

meaning at all because there's no way to

4:00

focus an infinity amount of time into

4:02

anything and have it be meaningful. So,

4:06

I'm taking mortality as a very serious

4:08

force operating on happiness,

4:11

productivity. Can you do something for

4:14

the world?

4:15

And on my tombstone,

4:18

what I want to say, what I want it to

4:21

say is a quote from Horus man. Be

4:23

ashamed to die until you have won some

4:26

victory for humanity. I want to have

4:29

made a difference in the world. I want

4:31

the world to have been better off

4:32

because I lived in it.

4:34

Is that too much to ask of any of us?

4:37

Really, we're all capable of good deeds.

4:40

So

4:41

if the world is better off, I'm I've

4:45

played my part as a citizen of planet

4:48

Earth.

4:49

>> And this all sort of dovetales into this

4:52

new book that you've written. Um it's I

4:54

call it a new book, but it's really a

4:55

revision of a very successful book that

4:58

uh I think the first copy was published

4:59

in 1998

5:01

called Just Visiting the Planet. Further

5:03

scientific adventures of Merlin from

5:06

Amnesia.

5:07

>> Amnissia. Yeah. When I think about these

5:10

bigger questions about the universe,

5:12

meaning purpose, death, why am I here,

5:15

religion, all these things, so often I

5:18

think about them through the context and

5:20

information that I find in your work

5:21

because when I think of like the world

5:23

being so big, as you talk about in this

5:26

book and so infinite and all these

5:28

stars, I feel meaningless in a nice way.

5:31

Sometimes I feel like the that I

5:34

that I worry about no longer matters.

5:36

But then when you talk about

5:37

>> you feel meaningless in a happy way.

5:40

>> Yeah. I feel like the things that cause

5:41

me uh suffering don't matter as much as

5:44

I thought they did. And then you talked

5:46

about shortening time by realizing that

5:48

you're going to live for 90 years or or

5:50

80 years creating great amounts of

5:52

meaning. And it feels somewhat like a I

5:55

don't know.

5:56

>> Yes. The universe is huge in size, in

6:00

age, in contents. There's nothing we can

6:04

put on the table that can rival

6:08

those measurements that we make of the

6:10

universe. However,

6:12

>> how big?

6:13

>> Well, there's the light from the most

6:17

distant galaxies has been traveling for

6:19

nearly 14 billion years. 10 billion

6:23

years more than Earth has even existed

6:27

if you want to get a sense of that. And

6:30

so but think about it a whole other way

6:35

that if you look at the ingredients of

6:37

life

6:39

not just human life but life on earth

6:41

and you can rank the elements what's the

6:44

number one element in life we could

6:47

mention the human body number one

6:48

element is hydrogen

6:50

that's contained in the H2O

6:53

of the water content of your body which

6:56

depending on how chubby you are can

6:58

anywhere from a half to 3/4 of your body

7:01

weight is water

7:03

and all right what's the next most

7:06

abundant element in your body it's

7:09

oxygen attached to the water okay H2O

7:13

and both the H and the O appear in many

7:15

many other molecules in our body in the

7:17

DNA and in your muscle tissue all of

7:20

this and in the blood okay what's third

7:25

carbon which you would have thought had

7:27

to be somewhere in the just because you

7:29

know we're carbon based life. Fourth is

7:32

nitrogen.

7:33

Okay. Fifth, I'll put them all together

7:35

and just say other. Okay. So that's the

7:38

sequence of elements. And now you say,

7:41

what are the sequence of elements in the

7:43

universe? The number one is hydrogen.

7:46

The number two is helium, but that's

7:48

chemically inert. You might remember

7:49

from high school chemistry. You can't do

7:51

anything with it anyway. Helium. Next in

7:54

the universe, oxygen. Next, carbon. Next

7:57

nitrogen. Next

8:00

other. Okay. So we are one for one

8:04

matched to the ingredients of the

8:07

universe. And one of the gifts of 20th

8:10

century astrophysics

8:12

is gifts to civilization is where those

8:16

ingredients came from.

8:19

We trace those ingredients, the hydrogen

8:22

to the big bang itself and all these

8:25

heavier elements to stars that

8:27

manufactured those elements in their

8:29

core and the crucible that is their

8:31

core. They lived out their lives. They

8:34

exploded, scattered that enrichment into

8:36

gas clouds so that the next generation

8:38

of stars would have planets and at least

8:42

one of them

8:44

have life as we know it, life on Earth.

8:48

So that

8:50

we you you can think of us not just

8:53

figuratively

8:55

but literally composed of stardust.

8:59

And so so that it's not that we are

9:02

alive in the universe. Yes, that's true.

9:05

But the universe is alive within us. So

9:09

we're special because we're the same as

9:12

the universe. often when people think

9:15

they're special, I want to be different

9:17

from No, we're saying because we have

9:20

human DNA on an earth where we have DNA

9:24

in common with all other animals, all

9:27

other life forms on Earth. Do you

9:30

realize we we and mushrooms have more in

9:34

common with each other than either we or

9:38

mushrooms have with green plants? The

9:41

common ancestor between fungus and

9:43

animals split later in the tree of life.

9:46

Then its common ancestor split with

9:48

green plants.

9:50

>> You You have 20% identical genes to a

9:54

banana.

9:56

>> Excuse me.

9:57

>> We all do. Not just you. Not just you.

9:59

Okay.

10:01

>> You have it. So when you consider all of

10:05

this,

10:08

it's it's not just that we're alive in

10:10

the universe.

10:12

The universe is alive within us.

10:15

>> And that that discovery

10:18

>> borders on the spiritual.

10:20

>> Yeah.

10:20

>> And it's a scientific result. So when I

10:23

look up at night, I never feel small. I

10:27

feel large. I feel as large as the

10:31

universe itself because that's where we

10:33

came from. We're a participant in a

10:35

great unfolding story of cosmic

10:39

evolution.

10:41

>> The minute you said that, I thought of

10:42

all these Eastern traditions and

10:44

religions that say we are one. And from

10:47

a scientific perspective,

10:49

as you say, we very much are one.

10:52

>> Yeah. It's what's interesting is one of

10:56

my deep concerns about the world is many

10:59

philosophies or religions that say we

11:01

are one. They find some other philosophy

11:03

that differs and then they go to war.

11:05

>> Yeah.

11:06

>> I don't mean to laugh at that, but it's

11:08

we're not good at feeling oneness with

11:11

everyone. It's easy to feel oneness with

11:14

our tribe. Our tribe could be skin

11:17

color, religion, who you sleep with, who

11:19

you don't sleep with, what food you eat,

11:21

what rituals you perform. And so those

11:25

people choose sides based on so many

11:29

factors that

11:32

I I it's actually to me just as a

11:34

scientist it's disturbing how easily and

11:38

quickly we will divide each other

11:41

without and make that the reason for how

11:44

you interact rather than see what we

11:46

have in common and make that the reason

11:49

for why we would come together. This has

11:51

been really front of mind for me for the

11:53

last 24 hours. There's been a lot of

11:54

things that have happened in the news

11:55

that have thrown the conversation around

11:58

division to the very front of my mind

12:00

and that you know in the UK we've got

12:01

all these people that are marching next

12:03

week I believe um through London because

12:05

of you know various political things and

12:07

I was saying to my friends last night I

12:09

said I think actually that the root

12:10

cause isn't this or that it's the

12:13

division itself and it's

12:15

>> yeah you can overanalyze I mean if you

12:17

look deeper than whatever people are

12:19

saying is the reason they are marching

12:22

or arguing If you just, you know, part

12:25

the curtains and unpack it all, at the

12:27

bottom of that is

12:30

there's a tribe here and a tribe here

12:32

and they think this way and they think

12:33

that way and never the twain meet unless

12:38

we rethink how we interact with one

12:41

another. It's it's I mean, think about

12:45

it, you know, with the race

12:50

the race friction that existed around

12:53

the world, but especially in in colonial

12:57

Europe and the slave trade and all of

12:59

this and and okay, that's not good. It's

13:04

bad. Uh, and all right, but then you

13:08

look at World War I and World War II,

13:11

that's white people fighting white

13:13

people,

13:14

>> slaughtering them in great numbers. So,

13:16

you can divide by skin color, but

13:18

apparently people find plenty of reasons

13:21

to divide and conquer, to divide and

13:23

kill, to divide and oppress. and and

13:27

skin color is one in a long list of all

13:29

the reasons people have given to the

13:32

religious wars to worshiping the

13:35

different god or worshiping the god

13:37

differently. These are human beings. And

13:39

you know, I wrote a whole book, one of I

13:40

think one of those books in your stash

13:42

there, that one. Yeah. Cosmic

13:45

perspectives on civilization. The one in

13:48

your left hand there, that one is is

13:51

what conflict in the world looks like

13:55

when you are scientifically literate and

13:58

you have a dose of cosmic perspective on

14:00

top of it.

14:01

>> Give me the cosmic perspective, please.

14:04

It's

14:06

you're fighting over that line in the

14:08

sand. When I'm out here at the moon

14:11

looking at Earth, this fragile

14:13

ecosystem, do you realize Earth's

14:16

atmosphere is to Earth what the skin of

14:19

an apple is to an apple in terms of

14:22

thickness. So, I see people trashing the

14:26

planet, fighting one another. again just

14:29

based on who's on what side of the line

14:31

in the sand or who they worship or who

14:32

they don't worship or what their skin

14:33

color is or where they were born, what

14:35

language they speak, what accent they

14:37

have. And I step back and from orbit

14:41

it's

14:43

ocean, land, clouds.

14:48

From the moon, there's Earth suspended

14:50

there in space.

14:53

I almost don't want to zoom in on it

14:57

because people value what they think is

15:01

true

15:03

more than what

15:05

is true. There are objective truths out

15:07

there, but it's almost as though people

15:13

fight and argue more vehematly the less

15:16

evidence there is to support what it is

15:18

they think is true.

15:21

There's an old saying, if an argument

15:22

lasts more than five minutes, then both

15:25

sides are wrong.

15:28

>> This it's true probably 80 90% of the

15:31

time, but it's something definitely

15:32

something to think about.

15:34

>> How have your spiritual and religious

15:36

beliefs evolved throughout the course of

15:38

your career based on all that you've

15:40

come to know about the objective nature

15:42

of the universe? Has there been an

15:43

evolution?

15:45

>> It depends on what you mean by

15:46

evolution. I was raised Catholic.

15:48

>> Yeah. But we were raised basically in a

15:50

secular household even though we would

15:52

go to church every weekend. What I mean

15:54

by that is we come home at no time do

15:57

either of my parents say, "Don't do

15:59

that. Jesus is watching. You keep that

16:01

up, you'll go to hell. Do this cuz it'll

16:03

please God."

16:05

Never was there such a conversation as

16:07

that in the household. So the household

16:11

was driven by

16:14

objective truths or or life experience

16:16

as would be brought from elders to the

16:19

next generation. Something that was more

16:21

common in that generation than in the

16:23

current generation because now elders

16:25

don't know anything about anything. You

16:27

know your kid comes up to you and say

16:28

mommy daddy I want to be a a YouTube

16:31

influencer. And you're saying what? Go

16:33

back to school. No. And then they become

16:35

a YouTube influencer and they out earn

16:37

you. So this the the the divide is

16:40

greater than ever before between one

16:42

generation and the next for sure. But by

16:45

the time I turned eight, I found the

16:48

religious teachings less and less

16:49

convincing. And so by the time I I was

16:53

nine when I discovered the universe or

16:55

really the universe discovered me, a

16:57

first visit to my local planetarium. So

17:00

yeah, I I wouldn't call it an evolution,

17:02

but I will say this. You didn't ask

17:04

this, but it relates.

17:07

Before I was more recognized, you know,

17:09

you'd be on an airplane. What do you do?

17:11

What do you do? Okay. They find out I do

17:13

astrophysics. Then out come the

17:15

questions. Okay. Oh, tell me about black

17:17

holes, relativity, the big bang. Uh,

17:20

aliens. Okay. And would always land on

17:24

God. And I used to give pretty straight

17:29

unforgiving answers to that question, to

17:32

that inquiry. But then I thought that's

17:33

not fair. There are people whose lives

17:36

pivot around their religious beliefs and

17:38

their spirituality.

17:40

And just cuz I've been discounting it

17:42

since I was eight. I shouldn't use that

17:46

as a force against them. I should at

17:49

least

17:52

understand where they're coming from. So

17:55

I systematically

17:57

acquired religious books

17:59

of all kinds. So I have the Torah. I

18:02

have multiple copies of the Quran,

18:04

Joseph Smith's account that led to the

18:07

Mormons. I have uh multiple

18:11

uh bits of literature from Jehovah's

18:14

Witnesses because they'll come to your

18:15

door and they want to hand you. So I

18:17

acquired all these books and I mostly

18:19

read them. I've skimmed all of them and

18:22

read some of them with a little more

18:24

intensity than others. All right.

18:27

On doing so, that enabled me, empowered

18:31

me to have more meaningful conversations

18:34

with people who were religious,

18:38

much more meaningful and more informed.

18:40

That's the key. I don't want to speak

18:42

about a religion unless I know as much

18:45

as I can about it. As an academic, that

18:47

should be what would be true of any

18:49

subject. You're an academic. You care

18:51

what's true, not what you think is true,

18:53

what is true or what people think.

18:56

>> All right? And there's no doubt that

18:59

religion has been one of the greatest

19:00

forces operating on civilization ever

19:04

since civilization.

19:05

When you look at as a source of people's

19:08

behavior, what they eat, like I said,

19:10

who they sleep with, where they sleep,

19:13

where they worship, who they worship,

19:15

all around the world, from animistic

19:17

native peoples where there's a spirit

19:20

energy imbued in the in the mountain, in

19:23

the brook, in the wind to

19:27

uh the monotheistic religions to the

19:29

polytheistic religions.

19:32

We don't call them that to put distance

19:34

between us. But the Greek gods were it

19:38

was their religion. We call it

19:39

mythology.

19:41

It was their religion. The Greek gods,

19:43

the Roman gods. So I'm I'm

19:46

conversational in all of this. So that

19:49

when someone says, "How do I feel? What

19:51

do I think?" I can do that without just

19:55

being obnoxious.

19:59

And so and and it's a have a meaningful

20:01

conversation.

20:02

>> I haven't done that.

20:03

>> You haven't?

20:04

>> No, I haven't. I haven't. But it's such

20:05

a good idea to do that, especially as

20:07

someone in my position that does a lot

20:08

of talking with people and asking

20:10

questions. But my the first thing that

20:11

sprung to mind was there was actually

20:13

two questions that sprung to mind. The

20:14

first was

20:16

how did that change you reading all

20:18

those books outside of you being able to

20:21

relate um with those well being able to

20:22

talk to them in a different way? And the

20:24

second question cuz I've watched Cosmos.

20:26

I've watched it several times. It's my

20:28

one of my me and my partner's favorite

20:30

things to watch is you you going from

20:32

the very beginnings of time through the

20:34

universe into where we are.

20:35

>> You gotta love that calendar too.

20:37

>> That's my favorite thing and I try and

20:39

persuade everybody to watch that. My

20:40

question was about because I watched

20:41

that and I watched um how the universe

20:43

has evolved over time or at least our

20:45

understanding of it and and how it came

20:47

to be is did humans

20:50

evolve at some point to believe? Are we

20:52

meant to believe? Well, so the best way

20:57

to ask that is let's go back to the

20:59

earliest humans we have fossil records

21:01

of and we can go back to Neanderthal.

21:04

For example, Neanderthal is is a branch

21:08

of homminids that went extinct.

21:10

Basically, there's some crossbreeding

21:12

and there's Neanderthal DNA in many

21:16

humans today, but as a as a branch of of

21:20

the homminids, they they went extinct.

21:22

So the Neanderthal then there's

21:24

Cromagnon uh we are you know Homo

21:26

sapiens

21:28

coming after Cromagnon and so when you

21:32

look at burial grounds

21:35

the Neanderthal bury their dead with

21:38

things with parts of their life of the

21:42

person who died. Now, why would you do

21:45

that unless you had some belief

21:50

that there was something more to come

21:52

for that person?

21:54

I mean that probably the people who took

21:56

it to the limit were the Egyptians. All

21:58

right. For the Egyptian royalty. I mean,

22:01

they bury you with all kinds of stuff.

22:03

Yeah.

22:04

>> And in fact, in Greece, I I read this,

22:08

it's not that I researched it, and I'm

22:09

not a scholar in this, but that when

22:12

they buried you, they put a coin in your

22:16

mouth or in your hand somewhere on your

22:17

body so that when you got into Hades,

22:21

you can tip the ferryboat driver to

22:24

cross the river sticks to get into

22:26

Hades. You might even say that's the

22:29

beginning of what it was to be human

22:30

when people started thinking that way

22:32

about dying.

22:35

>> I mean, you might even re invert the

22:37

question and say it's not when did we

22:41

start. It's we existed

22:44

in all the ways we know oursel know what

22:47

ourselves to be when that ritual came

22:51

upon

22:52

our ancestors

22:54

>> and the survival benefit in believing. I

22:56

I don't know

22:57

>> really.

22:58

>> Yeah. I I don't know. We We're pretty

23:02

sure there's a survival benefit of group

23:05

think

23:06

and

23:08

religion is group think. If there ever

23:11

was. It was we will all believe this

23:14

>> in this way and we will behave in that

23:17

way on those occasions and you will not

23:20

deviate from it. Yes.

23:22

>> And part of that package of beliefs

23:25

includes statements about the afterlife

23:28

and how you should behave in this life.

23:30

Otherwise, you don't go to heaven. You

23:32

go to hell. I don't think Judaism has a

23:35

hell, but you you're not as rewarded as

23:37

you'd otherwise be. Now that forms a a

23:41

corpus of beliefs that can be highly

23:44

binding of a peoples

23:47

and especially if some other peoples

23:50

come up and they do other things and you

23:52

don't understand it, you don't know what

23:53

it is and they're they're a threat and

23:56

so you keep them out. You you do

23:59

whatever you can to preserve your

24:01

traditions relative to theirs.

24:03

Ultimately the worst that in its worst

24:06

manifestation is all out war. we just

24:09

kill people who don't believe the way

24:10

you do. So, so maybe

24:15

religion is kind of what defined humans

24:18

in the fossil record. I mean, like I

24:21

said, that's an interesting inversion of

24:23

that question. Not when did humans begin

24:25

being religious?

24:26

>> You define

24:28

who we are as humans as when religion

24:31

showed up in the in the burial grounds

24:33

of

24:35

of cavemen. you just talked about as

24:37

being bound there by certain shared

24:39

beliefs and ideas. And I think in

24:41

>> I think I I think ritual is one of the

24:43

strongest binding forces of society that

24:45

we have.

24:47

>> And I I think that people are maybe

24:49

unbinding. You can if you look at the

24:51

narrative in society, it's about be your

24:52

own boss, stand on your own two feet.

24:54

More people are lonely, living alone, um

24:56

having less kids, are working freelance

24:59

and remotely. So it feels like in a

25:01

weird way we're becoming more

25:04

independent and there's a somewhat of a

25:07

cost to that and actually my friends

25:08

that are struggling the most in their

25:09

lives are those that have the least

25:11

dependence

25:13

on a village. So I always wonder if

25:15

people we need to ladder up to the

25:16

universe i.e. me, my family, maybe my

25:20

village, maybe my country, the planet,

25:23

the universe

25:25

in God

25:25

>> the metaverse.

25:26

>> Yeah. And like God

25:27

>> the multiverse. Yeah. So let me just

25:29

react to that.

25:31

>> There have been studies about the

25:33

psychological effects of this kind of

25:35

life. Basically the the social media too

25:39

early in one's life

25:40

>> uh force that operates. But I

25:45

so I don't know. I don't want to be the

25:47

person who says in my day we did it

25:49

right and you you youngans don't know

25:51

what you're doing and you're all going

25:52

to I mean I've seen the films of people

25:56

of officials smashing pinball machines

25:58

with sledgehammers saying it will be the

26:01

death of the next generation because

26:04

it's they're not studying. They're

26:06

they're it's gambling. They I've seen

26:08

you've seen see people burning rock and

26:10

roll records

26:11

>> you know. We've seen We've seen this and

26:16

I I'm I don't want to be that guy. I'd

26:18

rather be the person that says

26:21

they're going to create a whole other

26:23

reality

26:24

that was not my reality growing up. And

26:28

I don't know that I can or should value

26:30

judge that.

26:31

>> When they come up in the ranks, they'll

26:33

be mature adults. They'll figure out

26:36

what the rhythms are of that world. And

26:40

I will say, however, that if you go far

26:41

enough back, no one ever traveled

26:43

anywhere, you you you'd spend your whole

26:46

life not going more than 30 miles from

26:48

your hometown. Two, a couple hundred

26:49

years back. So now people do actually

26:53

communicate with countless thousands of

26:56

people around the world. So that's it's

26:59

different. I'm again, I'm not value

27:01

judging it, but it's different. And

27:04

you're exposed to different ideas. think

27:06

maybe it tribalizes you more or maybe it

27:09

softens you. It has the power to do

27:11

both.

27:13

What concerns me is because when I post

27:16

to social media, I've learned the art of

27:18

not expressing an opinion because I

27:20

don't care what your opinion is. I don't

27:23

care that you have my opinion. What I

27:26

care about as an educator and as

27:28

especially as a scientist is that your

27:30

opinion is based on objective reality,

27:34

objective truths. If you have an opinion

27:36

where the foundation of it is what do

27:38

you what what then you're just floating.

27:40

There's no and then if you rise to power

27:44

of laws and legislation and then you

27:47

shape a society based on what you think

27:49

is true or want to be true rather than

27:51

what is objectively true. That's a

27:53

recipe for the unraveling of

27:55

civilization as we know it. So this

27:59

loneliness bit I I don't know how to

28:01

comment on that. I I don't have the

28:03

expertise, but I do know that I don't

28:06

want to be the person on the rocking

28:08

chair. Get off my lawn. You

28:13

>> and I I I guess I I've been trying to

28:15

figure out if we if I need to make try

28:17

and make sure my life ladders upwards.

28:19

>> Oh. Oh, let me get back to that. So it

28:21

may be that the most important role of

28:25

church

28:27

wasn't to give a specific recipe for how

28:31

you pray or again who you pray to or

28:33

when you pray. Maybe that's maybe that

28:34

wasn't its greatest value. Maybe its

28:37

greatest value was the community that it

28:40

created.

28:40

>> Mhm.

28:42

>> Everyone comes together and they're all

28:44

in one room

28:45

>> at the same time. That's not happening

28:48

today. Like you said, there's a people

28:51

are less religious today than ever

28:53

before. Uh there many people who were

28:55

once religious would today statistically

28:57

would today say they're spiritual, which

29:00

means they're separated from the rules

29:02

and regulations that that typically

29:06

um dictate how you behave within a

29:09

religion. But the fact is you're talking

29:10

about going upwards. So you have your

29:13

your city, your community, your

29:15

neighbors and your church, your

29:17

synagogue, your mosque, your your your

29:20

temple, whatever is the the the place

29:24

where you gather with some frequency. Uh

29:27

that

29:29

surely has value

29:31

because we need each other.

29:35

I'm jealous when I, you know, you drive

29:36

down the country road and there's a deer

29:39

just walking around and I'm thinking,

29:42

you know, society collapsed. That deer

29:44

is just fine. The deer was born in the

29:47

woods, is finding food, is grown up,

29:52

whereas I need other people to survive

29:55

in this world. I don't know how to hunt.

29:57

I don't know how to skin game. I don't

29:59

know. You know, I'd like knowing that

30:01

there's a quart of milk waiting for me

30:03

on the grocery store and and you know,

30:06

ready to eat cereals. That's

30:10

we have an interdependence as never

30:12

before.

30:13

>> And how do we maintain that without

30:16

scattering to the winds?

30:19

>> You said you lost both your parents in

30:20

the last 5 years.

30:21

>> Yeah.

30:22

as someone that knows so much about the

30:24

universe and objective truth and

30:26

reality, how do you how do you contend

30:28

with grief in that scenario, but also

30:30

how does that does that change you in

30:32

any way?

30:33

>> It did a little bit. Not as much as I

30:35

thought it might have. Uh my father was

30:38

89 when he died. That was 5 years ago.

30:40

My mother was 2 days shy of her 95th

30:43

birthday. So that's what So I'm putting

30:45

myself like right between them in my

30:47

life expectancy. I think I'll get to 92.

30:49

It's it's the average of those two, you

30:52

know. So

30:54

when you die at that age,

30:58

it's sad, but it's not tragic.

31:00

>> So I that's an important distinction for

31:03

me. A tragic life is a life that could

31:05

have been lived, but through act of war

31:09

or negligence or or negligence of the

31:13

person or of others, the life is cut

31:16

short.

31:18

Then that's

31:19

tragic.

31:21

It's a life not fully lived, but if you

31:24

lived a full life,

31:26

they were married 50 something years.

31:29

Uh

31:31

it's sad, but it's not tragic. In fact,

31:32

it's not even sad. It's something to

31:34

celebrate.

31:36

And so I miss them.

31:40

I miss them more than I thought I would

31:42

because they carried quite a bit of

31:44

wisdom with them. My father was active

31:45

in the civil rights movement. My mother

31:48

uh was a gerontologist. So they both

31:51

cared very deeply about the plight of

31:52

others and I'm their son, the

31:54

astrophysicist, but so I go off with my

31:57

head in the sky. But I was anchored into

32:01

the human condition and anchored to

32:04

think about it, to care about it. And

32:08

when I encounter

32:11

things in modern life

32:14

is I wonder what my mother would say

32:16

about that. I wonder what insights my

32:18

father and they're not there. I don't

32:20

have them for that. So the way it's

32:22

changed me is it has put a greater

32:25

expectation

32:26

of me on myself

32:29

to make sure I have wisdom that I can

32:32

share with my kids my two kids. the kind

32:36

of wisdom that I gleaned from my

32:37

parents.

32:39

So that again this is not wisdom of what

32:43

car to buy or what job to have because

32:45

they have other values they have other

32:48

expectations of society but in terms of

32:54

humanto human interaction in terms of

32:56

love terms of challenges in life and

33:00

overcoming them. Some of those are

33:02

timeless. Some of those are, you know,

33:05

how to how to navigate difficult people,

33:08

how to appreciate nature so you don't

33:13

take it for granted.

33:15

Uh, one of the things I liked about

33:16

Joyce Kilmer's poem

33:19

on a tree,

33:22

uh, is about a tree. And we've all seen

33:25

trees.

33:27

So, why does this matter? Because it

33:30

takes an artist,

33:32

a poet, a writer, a sculptor, a painter.

33:36

For me, the artist job

33:40

is to encourage us, stimulate us

33:45

to pay attention to things we might

33:47

otherwise take for granted.

33:50

Because so much of life

33:53

is what you might just walk by and not

33:56

even give it any thought.

33:59

And so I don't walk by trees without

34:01

thinking something about that poem.

34:04

>> What is the poem?

34:05

>> I think that I shall never see a poem

34:09

lovely as a tree. A tree whose hungry

34:12

mouth is pressed against the earth's

34:15

sweet flowering breast. A tree that

34:18

looks at God all day and lifts her leafy

34:22

arms to pray. A tree that may in summer

34:26

wear a nest of robins in her hair. Upon

34:30

whose bosom snow has lain, who

34:34

ultimately lives with rain? Poems are

34:38

made by fools like me.

34:42

But only God can make a tree.

34:49

But only God can make a tree. I spend so

34:53

long these days thinking and talking to

34:54

people about what all of this means and

34:57

uh I've got more and more I saw you

34:59

talking about the simulation theory once

35:00

or twice

35:02

>> and I I started to fall into that that

35:04

hole of thinking.

35:05

>> Oh yes it's No, you got to you know

35:09

>> step outside every now and then and you

35:12

know smell the roses.

35:14

>> But you said you wouldn't be surprised

35:16

if people found out the universe is

35:17

simulated by some sort of advanced life

35:20

form.

35:20

>> Yeah. Given what we can now compute,

35:23

throw in quantum computing on top of

35:24

that,

35:26

we we don't have this power yet. But to

35:28

make a world in our computer where the

35:30

characters that in that world believe

35:32

they have free will

35:34

and then they conduct themselves and

35:36

then they invent computers and then they

35:38

make a world inside of their computer

35:41

and where their characters think they

35:43

have free will and then they so then

35:45

it's this simulated universes all the

35:47

way down and

35:50

close your eyes and throw a dart. Which

35:52

of these are you going to get the first

35:54

universe that invented the simulated

35:56

universe or the zillion ones that

35:58

followed? The dart's likely to hit one

36:01

of the others. But my my escape hatch

36:05

from that is

36:08

since we do not yet know or have the

36:11

power to make a perfectly simulated

36:13

world, it means we are either the first

36:17

universe that's real that hasn't created

36:20

one yet or we're the last universe

36:24

that hasn't evolved yet to have created

36:26

one of its own cuz all the middles have

36:29

the power to create one. So that takes

36:31

it, you know, a zillion to one against

36:34

us to maybe 50/50.

36:36

>> Oh, interesting. Never heard that

36:38

before.

36:38

>> So I'm a little I'm a little more

36:39

comfortable that way.

36:43

>> Comfortable?

36:43

>> Yeah, I sleep a little better at night.

36:46

>> But I guess it wouldn't matter anyway if

36:47

we

36:48

>> It actually it wouldn't matter if we're

36:49

completely simulated. What do you care?

36:51

You're living your life. You I know we

36:53

don't want to believe that there are

36:55

puppet strings on us.

36:58

Um, part of me thinks that though,

37:03

you know, just when Earth is kind of

37:05

everything on Earth is kind of stable.

37:07

Oh, CO shows up. Oh, so this this is the

37:10

programmer saying, you know, the earth

37:11

is too boring now. We got to spice it up

37:14

a bit. They throw in a pandemic. Okay. A

37:17

once in a century pandemic. Now, now

37:20

we're entertaining for them. What do we

37:22

do? Who gets vaccinated? Who doesn't?

37:24

Who's going to fight? Who dies? Who

37:26

lives? Okay. So then we kind of get

37:28

through that. We get the vaccine.

37:31

Okay. Just calming down off of that and

37:34

they said, "Oh, let's make a billionaire

37:37

real estate developer from New York City

37:39

the most powerful person in the world.

37:41

Let's stir the pot again." And so now

37:43

there's a whole other set of stir pot

37:45

stirring that's going on. So that's kind

37:47

of consistent with

37:50

a snot-nosed alien

37:54

kid in their parents' basement

37:56

programming our existence.

38:00

That's what I would do. I would throw in

38:02

interest. There's a game Sim Sim City.

38:05

>> Yeah,

38:05

>> I played that. That's how old I am. Sim

38:07

City. So you were mayor of this city and

38:11

people can vote you out of office. Uh,

38:13

so you have to do things that make them

38:15

happy and there's an opinion poll that's

38:17

there. And if you spend too much money

38:19

here, you're not spending money on the

38:20

schools. That's bad. But then there's

38:22

crime goes up and you're realizing, oh

38:24

my gosh, in even this simple simulation,

38:27

so many interdependent

38:29

phenomenon are taking place. Then

38:33

then you things that happen then

38:35

Godzilla steps through and plows through

38:38

the city. Okay. Now, Godzilla is not

38:40

real, but it kind of is because that

38:44

would be a disaster. That is it a flood?

38:46

Is it fires? It's it's a thing that

38:49

nobody saw coming. Okay, we are

38:52

recording this interview on September

38:55

11th. I live four blocks from ground

38:58

zero. That's Godzilla walking through

39:01

the city. How do you respond to that?

39:03

What's You know, you didn't know that

39:05

was going to happen the day before. So

39:08

realizing that in this game it's only

39:11

interesting to play when disastrous

39:14

things happen, not too many in a row

39:16

because you have to be able to recover.

39:18

So when I look at our world, I'm

39:20

thinking the best argument I have for

39:21

being in a simulation is how often some

39:24

big disaster takes place. When it was

39:27

the first world war and then after that

39:30

the peace, oh pandemic. Okay, the the

39:33

1918 flu pandemic. Hey, now we get out

39:36

of that. Oh, no. Second World War. Okay,

39:41

we get out of that. The Cold War,

39:44

nuclear holocaust. Okay, so that's my

39:49

that's me looking over the shoulder of

39:51

the programmer.

39:54

>> Oh god. I think I prefer the world where

39:57

I feel like I have free will and there's

39:58

not.

40:00

>> Does it make a difference if you believe

40:02

you have free will even if you don't?

40:04

No, because I'll never know.

40:05

>> And you know the fun the fun answer to

40:06

that uh ask me say uh do you have free

40:12

will? Ask me that.

40:13

>> Do you have do do we have free will? Do

40:15

you have free will?

40:17

>> What choice do I have?

40:22

>> No. If you don't have free will, then

40:24

you don't even have an option to say you

40:26

don't. So I So you just live life. Just

40:29

live your life so that the world is

40:32

better off for you having lived in it.

40:35

>> And what does that mean for you? Like

40:36

>> it means people are better off. The the

40:40

institutions are better off. People are

40:43

happier,

40:45

healthier,

40:47

wealthier,

40:48

safer,

40:50

better fed.

40:53

That rationality matters in politics, in

40:57

law makingaking.

40:59

And that helps to will help to ensure

41:03

stability of anything you build going

41:05

forward. But yeah, that's all. I mean,

41:08

it's not it's not complicated. And you

41:10

were talking about meaning before. I

41:12

stopped looking for meaning decades ago

41:15

because I realize

41:17

I we any of us has the power to make

41:22

meaning in life. If you're going to look

41:25

for meaning, are you looking under a

41:26

rock, behind a tree? What? It's as

41:30

though meaning is sitting there waiting

41:32

for you to find it. Oh, I found meaning.

41:34

There it is. Now my life is complete.

41:37

That feels so

41:39

so powerless

41:42

on your own destiny.

41:46

Whereas

41:48

I I make meaning I want to learn

41:49

something today that I didn't know

41:51

yesterday. I want to lessen the

41:53

suffering of someone today

41:57

compared with however that person was

41:59

living yesterday. I want to

42:03

I want to use what I learn

42:07

to well up within me and manifest as

42:11

wisdom

42:12

because information is not really useful

42:15

until it becomes knowledge. And then

42:18

knowledge is good. You can show off if

42:19

you have a lot of knowledge. That's what

42:21

these game shows do. But in the end,

42:25

the best use of knowledge is when it

42:27

becomes wisdom.

42:30

And wisdom,

42:32

people say, "I don't like getting older.

42:34

I want to be young again. I don't want

42:35

to be young again." When I was 30, I was

42:37

an idiot. Even when I was 30, I thought

42:39

I was brilliant. Right? So,

42:44

don't get older unless you have wisdom

42:47

to show for it.

42:49

It's when you don't have something to

42:51

show for your age, you want to be

42:53

younger.

42:54

You're just getting old with nothing to

42:56

show for it. But I continue to learn

42:59

things every day, passively and

43:01

actively. Passively is you just notice,

43:05

you know, open your eyes sometimes and

43:07

see what's happening, where things are

43:09

headed, what they're doing. You learn.

43:12

Not all things you learn are good. And

43:14

if they're bad or need adjustment or

43:16

need help,

43:18

do something about it if you can. So

43:21

that's how I derive meaning. Hence my

43:24

tombstone. Be ashamed to die unless

43:26

you've scored some victory for humanity.

43:28

There's the meaning for you.

43:30

>> There's a whole class of billionaires

43:31

that are trying to live forever now. And

43:34

I think we are on the verge of being

43:35

able to extend life potentially

43:37

indefinitely.

43:38

>> Yeah. We're looking for the date. It's

43:40

called escape velocity. You know about

43:42

that phrase? It exists in astrophysics

43:45

of course but the escape velocity for

43:47

earth for example is seven miles per

43:49

second. So escape velocity in

43:52

astrophysics is the speed that you

43:55

launch something so that it never comes

43:57

back no matter how hard the gravity

43:59

tries. Okay. So every object has an

44:02

escape velocity. The scape philosophy in

44:04

aging is

44:07

the idea is there is a generation yet to

44:12

be born but in the very near future

44:16

who

44:17

will not not only live longer than the

44:20

previous generation.

44:22

So so here here's a a cleaner way to say

44:25

this.

44:28

Every year

44:30

you can expect to live one month longer

44:33

>> because knowledge about human physiology

44:35

has gotten better.

44:36

>> Okay.

44:36

>> Okay. Just think about it that way.

44:38

>> Yeah.

44:39

>> And so we know what to eat, what not to

44:41

eat, how to exercise, how to not over

44:43

exercise, how to how to maintain your

44:45

health, well, your health and

44:46

physiology. All right. There will come a

44:49

day where

44:52

every year that you're alive, medicine

44:55

has figured out a way for you to live an

44:58

extra year.

45:00

That's the escape velocity.

45:03

So every year you live another year and

45:06

after that it could be every year you

45:08

live two years. So that's the escape

45:10

velocity.

45:12

So it's not just everybody lives forever

45:13

today. it sort of works its way into the

45:16

population and yeah I don't I don't want

45:20

to live forever.

45:22

I don't

45:25

take me off this earth

45:28

provided I mean I want I still have more

45:30

to give more books to write that in my

45:33

judgment would make the world better

45:36

than it currently is.

45:39

So, I don't want to die before I get as

45:42

much of that done as I can.

45:44

>> But are you scared of death?

45:46

>> No. Although that's easy to say cuz I'm

45:49

not at death's door.

45:52

>> And I had someone

45:55

rationalize with me, which is they made

45:57

a potent argument. It's I can say now

46:00

with another 20 years life expectancy,

46:03

15 20 years that I don't fear death. But

46:07

if I'm on my deathbed and someone says,

46:10

"If I can wave my hand and you could

46:12

live another year, would you?" The

46:14

answer is probably going to be yes and

46:16

at the end of that year if they So

46:19

I I don't know if my sentiments about

46:23

life and death will change

46:26

on my deathbed.

46:28

I know my mother there's a point where

46:31

she couldn't swallow and she didn't want

46:33

a feed tube and she said my time has

46:35

come

46:37

put me in in paliotative care and then

46:40

hospice and she was dead 10 days later.

46:43

So she was was in charge of her. They

46:46

could have fed her with a tube and she

46:50

would have been completely healthy for

46:51

another, you know, 5 years perhaps, but

46:54

nope. She raised two kids, three kids,

46:58

you know, 50-year marriage, happy life,

47:02

stable life,

47:04

and

47:05

yeah, I'm good with that. So the

47:07

billionaires, you know, that that's ego

47:09

for sure. If you live forever, there are

47:12

other people

47:13

who you're taking resources from who

47:16

would come behind you. That's one. But

47:18

two,

47:20

uh are you still contributing to the

47:22

world? Should you give another person a

47:25

chance who's in school now who might be

47:27

the next genius that'll figure out the

47:29

energy problem, the poverty problem, the

47:31

the pollution problem, the the Are you

47:33

figuring that out? No. You're in the

47:35

last You're You're 90 years old and

47:38

you're just living on your yacht.

47:41

So there's the pro there's the problem

47:44

that the last years of your life

47:48

are not the most creative, the most

47:51

ambitious, the most irreverent. It's a

47:54

reverence that where new ideas come. You

47:57

know, you've perhaps seen episodes of

47:59

Shark Shark Tank. You know, half or more

48:02

of those people are 30 and under. They

48:04

got ideas, fresh ideas. Everyone else is

48:06

entrenched. So if people start living

48:11

forever,

48:13

they're living forever in the part of

48:15

their life that is least useful to the

48:18

progress in advance of culture and

48:20

civilization. And so all of civilization

48:25

will stagnate.

48:26

>> Do do you think um in your lifetime you

48:29

said you've got a 20-year life

48:30

expectancy?

48:30

>> Well, 15 to 20.

48:32

>> 15 to 20 year life expectancy

48:33

>> based on my age now and the age my

48:35

parents died. Yeah,

48:36

>> but I mean you've done a lot of

48:38

neurological work and laid down a lot of

48:40

good foundations with all these books

48:41

you've written. So maybe it'll be the

48:43

upper end of that.

48:44

>> It's food for AI.

48:45

>> Food for chat GPT.

48:47

>> True.

48:48

>> What do you make of AI? What's your What

48:49

do you think?

48:50

>> I love it.

48:50

>> Yeah,

48:51

>> I love it. But I I'm

48:54

>> It's It's by the way, it's been here for

48:55

a while. It really spooked people when

48:58

it started writing your term paper and

49:00

composing your your painting and your

49:02

set design. All right, that the whole

49:04

other category of people got spooked by

49:06

that. Meanwhile, AI has been harnessed

49:09

and being fully used in my field and in

49:11

most of the physical sciences. Uh, it's

49:14

doing work. If you can do the work and

49:15

and I can go to the Bahamas, let it do

49:18

the work. We have telescopes coming

49:20

online that could not exist without the

49:22

intervention of AI to access the data,

49:24

reduce the data, analyze the data, make

49:26

a decision about whether it should go

49:28

back to the thing that had just observed

49:30

because that was weird compared the last

49:32

compared to the last time it was

49:33

observed. This is the Ver Rubin

49:35

telescope that I'm literally describing

49:37

now. And so we're we're we're living

49:40

with it. What it means is it ups it'll

49:43

have to up the game of people who say

49:45

they are creative. And what I mean by

49:47

that is I can say chat GPT take this

49:50

picture of us and say Chappie GPT

49:54

paint this scene in the style of Van Go.

49:58

It'll come back. The colors will be just

50:00

right. It'll have the swirly lines.

50:02

It'll be perfect. If Van Go were

50:04

standing, that's what Van Go would have

50:05

painted. If I say, "Chad GPT, paint us

50:08

in the style of no artist who has ever

50:10

lived."

50:12

I don't know what it's going to give us,

50:13

but it'll probably suck. Okay. And so

50:16

true creativity

50:20

is not aping what has happened before

50:22

and making adjustments. True creativity,

50:26

yes, you always build on others. I'm not

50:28

in denial of that. But true creativity

50:30

takes leaps

50:33

that most people don't even know can be

50:36

taken. Mhm.

50:38

>> And so the artist So that gap I think is

50:41

what what AI in the arts world is going

50:45

to force creative people to reach for.

50:49

Otherwise, you're replaced by

50:52

you're replaced by a a simple request in

50:56

the in the input line of of a large

51:00

language model or or of an art. I was

51:03

just wondering then if I watch Cosmos in

51:06

30 40 years time let's say 100 years

51:08

time I was wondering if this is the

51:10

moment where humans and computers in the

51:14

story of humanity become one and

51:16

intertwine if you think about things

51:17

like Neuralink which Elon's working on

51:19

to make when he first made that company

51:21

all of the narrative that he put out

51:22

there was about us being able to

51:24

interface with AI so we'd need like a

51:25

brain chip computer interface more

51:27

recently it's been about people that are

51:29

parapolgic and disabled and helping

51:31

blind people see but I think that's a

51:32

socially acceptable way to advance the

51:34

technology.

51:35

>> But in his early work, he said

51:38

>> super intelligence is going to arrive

51:39

and we're going to need a way to

51:40

basically keep up where we have better

51:42

sort of latency with um with the

51:45

technology. And I'm wondering if that's

51:47

like what we're seeing now.

51:49

>> Yeah. Super intelligence,

51:52

you know, if that happens,

51:55

then it becomes our overlord and we

51:57

become its pet.

51:58

>> Okay.

52:00

Now, that sounds pretty scary, but don't

52:05

we treat our pets better than we treat

52:08

other humans in the world? Think about

52:11

it. The pet is kept warm and fed and

52:14

happy and and would you do that for a

52:17

homeless person in the street? A person

52:19

of your own species? Probably not. So,

52:22

if we're the pet for the super

52:24

intelligence,

52:24

>> what about the chicken?

52:25

>> How bad could it be? We used to have

52:27

chickens when we were younger and I

52:28

watched my Nigerian mother chase that

52:29

chicken around the garden, grab it, pull

52:31

its head off, and cook it.

52:33

>> Wow. Okay. Yeah. Oh. Oh, you worried

52:35

that it's going to do that for us, so

52:36

we're going to run around.

52:37

>> Not all my pets made it

52:38

>> and snap. Not all the pets survive. Uh,

52:42

yeah. Depends on whether it needs us to

52:44

be alive or dead. We have to be relevant

52:47

to it in some way. Maybe we'll be

52:49

courtesters. We have to be

52:50

entertainment. Until then,

52:54

I I don't know that this is some special

52:56

moment. Uh I do a lot of reading of

52:59

history and throughout history.

53:02

Most occasions, especially in the era of

53:04

the industrial revolution, people think

53:06

they're living in a special moment.

53:08

>> And so I'm not going to be that guy who

53:09

says today is special because everyone

53:12

has thought they were in a special

53:13

moment.

53:14

>> And what do you think is the probability

53:15

of me getting to another planet in my

53:17

lifetime?

53:18

>> Zero.

53:20

>> Zero. Really?

53:22

>> Yeah.

53:24

You want to know why?

53:27

>> Yes, please.

53:28

>> Yeah, it's just zero.

53:29

>> I thought SpaceX going to go to Mars.

53:33

>> I have an unorthodox view on this. So,

53:35

you don't have to you don't have to

53:36

believe me,

53:38

you know. But

53:41

my read of history tells me that we only

53:43

do big expensive things if there's a

53:46

geopolitical reason for it. either an

53:48

economic

53:50

reason or a defense reason.

53:53

Uh not just cuz it's the next thing to

53:55

do.

53:57

And when we went to the moon, realize in

54:00

1961,

54:02

May 25th, President Kennedy, just 6

54:05

weeks after Yuri Gagarin flew around the

54:08

Earth in orbit, and we didn't have a a

54:11

ship that wouldn't blow up on the launch

54:13

pad that could carry humans yet.

54:16

He calls a joint session of Congress

54:18

and says, "If the events of recent weeks

54:21

couldn't even utter the man's name, the

54:23

events of recent weeks, and I

54:25

paraphrase, are any indication of the

54:28

impact of this adventure on the minds of

54:29

men everywhere, then we need to show the

54:31

world the path of freedom over the path

54:34

of tyranny."

54:36

It's a battlecry against communism, the

54:38

godless Russians,

54:40

everyone in the whole Soviet Union. We

54:43

were losing a technological race.

54:48

And that was the battlecry that prompted

54:51

Congress to write the check. Oh, later

54:53

on he says, "Oh, it'll be put a man on

54:56

the moon and before return him to safely

54:58

Earth and oh, that's so be let's hold

55:00

hand. That's so beautiful."

55:04

No one ever spent scads of money just

55:07

because it was a cool thing to do. That

55:08

has never happened ever. So,

55:12

we go to the moon.

55:15

People forgetting why we went to the

55:16

moon.

55:19

Say while we're on the moon, at this

55:22

rate, we'll be on Mars by 1985.

55:26

That'll be the next ambitious goal we'll

55:28

take on.

55:30

No,

55:32

because we didn't just go to the moon

55:33

because that was the next thing to do.

55:35

We went to the moon to beat the

55:37

Russians. And when we got to the moon

55:39

and we looked over our shoulder and the

55:40

Russians weren't there, we canled the

55:42

Apollo program.

55:44

197 We haven't been back to the moon in

55:46

53 years.

55:48

We canled it. Apollo 18 was ready to

55:51

fly. It's now in captivity in

55:53

Huntsville, Alabama in a museum on its

55:57

side. It's fascinating to walk the full

55:58

length of it. All rocket flight ready

56:01

parts. It never flew. We ended at Apollo

56:04

17.

56:06

No, we didn't go to Mars because we

56:08

didn't have geopolitical reasons to do

56:10

so. Neither economic nor for defense

56:13

reasons. Historically, people explored,

56:17

did expensive things for the glory of

56:20

God and royalty,

56:23

very expensive. The pyramids, the honor

56:26

of royalty. Okay. the church building,

56:29

cathedral building, all of these

56:31

activities. We're in the glory of power,

56:36

deity, and royalty. There's none of that

56:39

happens today. We're past that. The

56:42

power of kings and gods, that doesn't

56:44

happen. Nobody dislodges major

56:48

resources, capital resources of a nation

56:51

in the interest of a god or a king

56:54

anymore. Okay? It's secular. And secular

56:57

means it's money or it's war because you

57:00

feel threatened. Okay. So, you know,

57:04

we're going back to the moon now.

57:05

>> Yeah.

57:05

>> Project Artemis.

57:07

>> Did you ever think to stop and ask why?

57:10

Why didn't we stay on the moon in 1972?

57:12

Why don't we go back in 1980 or 1990,

57:15

2000, 2010? Oh, all of a sudden, let's

57:18

go back to the moon. Wouldn't that be

57:19

cool? Do you know when Artemis began in

57:22

the late teens?

57:25

Right about when China says, "We're

57:27

going to put Tykenauts on the moon."

57:31

>> Tyos.

57:32

>> No. Yeah. Chinese astronaut. Tyonaut.

57:35

>> All right. That's when we say, "Let's go

57:37

back to the moon." What a good idea.

57:38

Let's do that.

57:41

Really? Cuz we because it's just a good

57:43

idea. because we're a little bit spooked

57:47

by a friendly foe across the around the

57:50

world

57:52

might get the glory of that exercise.

57:56

And once again, it's a godless

57:58

country. Okay,

58:01

communism is godless by design, by

58:05

construct. So, here we are going back to

58:08

the moon. All right.

58:12

What motivation do we have to go to

58:13

Mars? Are there oil wells there? Is

58:17

there, you know, diamond mines?

58:20

We're not going to Mars. We're just not.

58:24

Unless

58:26

China says they want to put military

58:27

bases on Mars.

58:30

We're going to be in Mars in 10 months.

58:32

One month to design, build, and fund the

58:34

thing, and nine months to get to Mars. A

58:37

geopolitical force operating. Oh, by the

58:40

way, NASA doesn't have a rocket that'll

58:41

get us to Mars. They think they do, but

58:43

they don't really have one yet. Time to

58:46

do that. And say, "Well, does anybody

58:47

have a rocket?" Elon says, "I have a

58:49

rocket." So, if Elon rocket goes to

58:51

Mars, it's not cuz he sends it there.

58:54

It's cuz taxpayers sent it there.

58:57

By the way, he could go there on a

59:00

vanity project, but there's no business

59:02

case.

59:03

He He could fly to Mars, team up with

59:06

Jeff Bezos, they can send people to

59:08

Mars.

59:09

It's not a business case. And if you are

59:11

an investor in his company, you would

59:14

not agree to do that. You wouldn't. But

59:17

he doesn't need investors because he's

59:18

very wealthy. He could do it on his own.

59:21

Are you going to Mars as a tourist? Is

59:24

that Is that a business case? It'll It's

59:27

a trillion dollars to get to Mars.

59:29

First, second will be a little less.

59:33

I don't see that happening.

59:34

>> A trillion dollars

59:35

>> about that. Yeah.

59:38

If Earth were a school room globe,

59:42

with your fist, show me where you think

59:44

the moon is. This is Earth.

59:48

Take your fist and put it at the

59:49

distance the moon is. Your fist is about

59:51

the right size compared. Okay. Put

59:54

>> I mean,

59:56

>> right there.

59:56

>> Yeah.

59:57

>> Okay. Not too bad. It's 30t away. It's

60:00

in the next room.

60:01

>> Okay.

60:02

>> Okay. 30t away. Okay.

60:04

>> That's the moon.

60:06

>> Let's keep going.

60:08

How far away from Earth did the Bezos

60:10

Branson

60:12

uh rockets go?

60:13

>> Oh, not far.

60:14

>> The thickness of two dimes

60:17

above the surface of the Earth.

60:20

How far away is Mars? It's a mile away

60:23

>> from here.

60:24

>> Yes. From this Earth. It's a mile away.

60:28

>> It's in the Central Park.

60:29

>> The moon 30t away. Mars a mile away.

60:32

Yeah. It's a trillion dollars to Mars.

60:33

Yes.

60:34

>> How long?

60:35

>> 9 months. if and you have to wait till

60:37

the planets are configured so that when

60:41

you travel you arrive where Mars will be

60:45

when you get there and that's a minimum

60:47

energy orbit. If you had filling

60:49

stations along the way you can just fill

60:50

up with fuel and get there as fast as

60:52

you want but minimum energy orbit takes

60:54

about 9 months and then to come back you

60:56

have to wait till it it's configured

60:58

again a few years later so round trip to

61:01

Mars is 3 to 5 years easily. though

61:04

there's not an economic case. I'm not

61:07

saying we don't know how to get to Mars.

61:08

We have a SUVsized rover there now. All

61:11

right, discovering potential life from a

61:13

billion years ago. It's not about we

61:14

don't know how to get to Mars. This is

61:15

not a technological statement I'm

61:17

making. I'm talking about a practical

61:19

statement.

61:20

So, no, my read of history tells me no.

61:24

I I thought you were going to also add

61:25

to that that even if Elon wanted to do

61:27

it as a vanity project because he makes

61:29

all this money and manages to use

61:30

Starink as a way to fund it, whatever,

61:32

that the problem is Elon's going to die.

61:35

He's going to die in the, you know, the

61:37

next couple of decades, which means the

61:38

vanity element that comes from his

61:40

childhood situation where he wanted to

61:42

get out there and explore the stars cuz

61:44

he read that book has got 30 years, 40,

61:47

50 years left on it.

61:48

>> Well, that would make him want to hurry,

61:50

wouldn't it?

61:51

>> Yeah.

61:52

>> Yeah. And plus, he said, "I don't want

61:54

to die on Earth. I want to die on Mars."

61:56

>> Mhm.

61:57

>> I'm paraphrasing, but that's the idea.

62:00

So, that's a goal. Sure. But don't tell

62:02

me it's a it's it's a it's a business

62:05

case. I can see a tourist case going

62:07

into orbit and even possibly visiting

62:09

the moon. It's 3 days there, 3 days

62:11

back. That's a week's vacation that you

62:13

would take. And I would save up 5 years,

62:18

10 years of vacation money if that was

62:21

the amount that it would take to go to

62:22

the moon in for one week. That would be

62:24

a really fun bucket list item for me.

62:27

>> If you're starting a business, that

62:29

means you're one person doing the

62:30

workload of probably about 50 people.

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When I first founded this podcast, I had

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$1 a month. No way.

63:30

You know, you've written this, you've

63:31

revised this book.

63:33

>> Oh, yeah. Just visiting this planet.

63:34

Yeah. I wrote a a column, a question and

63:37

answer column for like 10 years, 15

63:39

years. where people just ask me

63:41

questions from the public and I had a

63:43

pen name called Merlin and Merlin was

63:45

friends with with Newton and Galileo and

63:48

Marie Cury and all these people. So if

63:51

you ask Merlin, "Dear Merlin, I don't

63:52

quite understand gravity." Merlin say,

63:54

"Oh, Merlin had a conversation with

63:55

Isaac Newton in his backyard." And

63:58

here's how he answers that.

64:00

>> I think in the book you talk about a

64:01

golf ball sized black hole would weigh

64:04

more than Earth and swallow it whole,

64:05

leaving behind something the size of a

64:07

lime.

64:08

>> Yeah. Slightly bigger. Right.

64:11

>> What is You've been asked this so many

64:13

times, but I still don't know the

64:14

answer. What is a black hole? And how do

64:16

we even know if they're real if no one's

64:18

ever been to one?

64:19

>> Well, you can know things without

64:20

visiting them. I mean, that's the

64:23

methods and tools and machines of

64:25

science are remarkable in their ability

64:27

to learn something without actually

64:30

having to see it with your eyes or hear

64:32

it with your ears or to touch it with

64:34

your fingers. We have

64:37

in fact science didn't take off until

64:41

these machines became a fundamental part

64:43

of how we investigated the world

64:45

replacing our five senses

64:48

>> because there's nothing more feeble in

64:49

this world than you thinking you

64:52

understand reality through your five

64:54

senses that that I don't want to call it

64:56

feeble I would call it errorprone

64:59

errorrone remember I told you about

65:01

escape velocity of earth

65:03

>> you remember what I the value I said it

65:06

7 miles

65:07

>> paying attention per minute per second.

65:09

>> Per second.

65:09

>> That's very fast. Seven miles per. So

65:11

the adage what goes up must come down.

65:13

>> Mhm.

65:15

>> That's not true. It's true for almost

65:16

anything you would experience. But you

65:19

can launch something at 7 miles per

65:22

second. It'll never ever come back.

65:23

That's the escape velocity for Earth.

65:25

Okay.

65:28

If Earth had more mass and the gravity

65:31

were stronger,

65:32

>> the escape velocity is higher.

65:35

That would make sense because there's

65:36

more gravity that you have to escape.

65:40

>> Let's keep up that exercise.

65:43

Cram in more and more mass. Just keep

65:46

doing that. Escape velocity keeps going

65:49

up. Eventually, the escape velocity hits

65:52

the speed of light.

65:55

At that point, light can't even escape.

65:58

Light is the fastest thing in the

65:59

universe. If light can't escape, if you

66:01

fall in, you don't escape either.

66:03

There's no better description of a hole

66:06

than that.

66:08

And worse yet, it's a hole in any

66:11

direction you approach it. Not just a

66:13

hole in the street or in the floor.

66:17

It's a three-dimensional hole.

66:20

And how do we know it's there? Because

66:21

it distorts the fabric of space and time

66:24

around it. We see galaxies behind

66:28

concentrations of matter black holes and

66:31

the shape of the galaxy is distorted

66:33

because Einstein tells us tells us that

66:35

gravity distorts the fabric of space and

66:38

time. So that's one way we discover

66:39

black holes. Another way is most stars

66:41

in the night sky are binary and multiple

66:43

star systems. Most of them

66:46

you can't see it because you just have

66:48

human vision. You whip out a telescope,

66:51

you see, oh my gosh, there are two

66:52

stars, not just one. If there's a pair

66:55

of stars and one of them becomes a black

66:57

hole and this one ages, it expands and

67:01

some of its material spills onto and

67:03

orbits around the event horizon of the

67:06

black hole. This swirling material,

67:09

>> gets hotter and hotter and hotter and it

67:12

radiates x-rays and ultraviolet.

67:15

We have x-ray and ultraviolet telescopes

67:18

that see every one of these in the night

67:20

sky. They're all black holes. And it's

67:23

created from an explosion.

67:25

>> Uh there's a a star that wants to

67:27

explode, but it has so much mass the

67:30

explosion doesn't overcome the gravity

67:33

and the star collapses down on itself to

67:35

make a black hole. That's one way to

67:37

make a black hole.

67:38

>> So our sun when that run

67:39

>> it's not going to become black. It's

67:41

pretty wimpy in that department.

67:44

It'll still kill us but for different

67:46

reasons.

67:48

So the mass of the object is so big that

67:50

it can't actually explode because the

67:51

gravitational pull inwards is so strong.

67:53

>> Correct. That's above a certain

67:55

threshold. Within there there's the

67:57

stars that the explosion is greater than

68:00

what the gravity can contain and it

68:01

makes a supernova. And those are the

68:03

stars that spread heavy elements across

68:06

the galaxy enabling us to even exist.

68:10

>> So I'm going to read this again. A golf

68:12

ball-sized black hole would weigh more

68:14

than Earth and swallow it whole, leaving

68:15

behind something the size of a lime.

68:18

>> Yeah. So, when black holes eat, they get

68:20

bigger. So, a lime is bigger than a golf

68:22

ball, but not by very much.

68:25

We can calculate what the size is.

68:28

>> Where would everything go?

68:30

>> It's in there. It's compressed down

68:31

inside the hole.

68:34

>> And if I was And everything near's going

68:35

to get pulled in there as well.

68:37

>> If it comes too close, right?

68:38

>> If it comes too close.

68:39

>> Yeah. You can stay, you can keep your

68:40

distance. Black holes don't they're not

68:42

giant sucking devices. I mean, if you

68:44

keep your distance, your if the sun

68:46

became a black hole right now, we would

68:48

still orbit it. The gravity we feel at

68:50

our distance is no different.

68:52

>> You say that if the sun suddenly shut

68:54

off, we'd freeze at -462

68:58

F, which is the background temperature

69:00

of the universe.

69:00

>> Yes.

69:01

>> Once the stored energy ran out.

69:02

>> Yeah.

69:03

>> Once the stored energy where ran out.

69:05

>> Well, in this in the Well, so there's

69:07

the sun's energy. the sun

69:10

blotted out. But Earth has energy inside

69:13

of itself as well. This is what gives us

69:15

volcanoes and continental drift and all

69:17

the rest of this. So if you don't have a

69:19

sun, you want to live near a volcano or

69:22

something that is a source of energy for

69:24

you. And then you'll live on Earth until

69:27

the Earth's energy died out. Ideally by

69:30

then you just go to another planet. I

69:32

mean why not?

69:33

>> How long has our our sun got left?

69:35

>> About another 5 billion years.

69:36

>> How would we know? It's a good question.

69:38

That's a the product of 20th century

69:41

modern astrophysics.

69:43

Then it was modern. I think of it as

69:44

modern where you say, "What kind of star

69:47

is this?" You look around the universe

69:49

for other stars that are just like it.

69:51

And then you see those stars in their

69:54

stages of evolution, stars being born,

69:58

living out their lives, and dying. And

70:00

the star changes its properties from

70:03

birth to death. And so you can line up

70:05

what where the sun is in that chart and

70:09

then plus we know how old earth is. So

70:12

we can directly measure the age of the

70:14

earth.

70:15

>> And so

70:17

there's no reason to think that earth

70:20

did not form at the same time the sun

70:22

did.

70:23

>> Another really um fascinating one was

70:26

every breath you take contains molecules

70:28

once inhaled by every human in history.

70:31

>> Yep. That can't be true.

70:35

>> Chat GPT it.

70:38

>> No. So, here it is. You ready?

70:39

>> Yeah.

70:42

>> There are more molecules of air

70:45

in a single breath of air

70:50

than there are breaths of air

70:53

in Earth's entire atmosphere.

70:57

So if you breathe in and then breathe

71:00

out,

71:02

there's enough molecules that you

71:03

breathe out to populate every breath

71:07

that anyone will ever again take on this

71:10

earth

71:12

and air mixes rather quickly.

71:15

Okay?

71:16

>> So you it has to mix. It's not

71:18

immediately. Give it some time, but you

71:20

give it some time. There are molecules

71:23

that went in and out of your lungs that

71:24

are in China being breathed by people

71:26

there uh when enough time is elapsed.

71:29

You can calculate that might is years 10

71:32

years something like that. There's

71:33

tremendous mixing of air. So how's that

71:37

for feeling kinship with others? Same

71:41

with water. You drink a water there more

71:43

molecules of water in a glass of water.

71:45

This is a mug of water than there are

71:48

mugs of water in all the world's oceans.

71:52

So you drink a mug of water and then it

71:55

comes out of you in any one of a half

71:56

dozen different ways.

71:59

There's enough molecules to scatter into

72:01

every other mug of water in the world.

72:04

So if someone gets a mug of your

72:06

molecules and be plenty more plenty of

72:08

molecules to go.

72:11

>> So if I do a big big inhale, I'm also

72:13

I'm inhaling air that contains molecules

72:16

that all of my living relatives once

72:19

inhaled.

72:20

>> Yes. and go further back. Jesus inhaled

72:23

him. Muhammad

72:25

>> and with every breath.

72:26

>> Yes. Every breath. This is the the the

72:29

the oneness of it all. That's why it's a

72:32

beautiful thing. Astrophysics.

72:36

I wouldn't live without it.

72:38

>> Do you think it's makes us kinder

72:40

learning about the universe or do you

72:41

think it makes us more nihilistic and

72:43

narcissistic? And

72:44

>> no. If you learn about it as you should,

72:46

you shouldn't be nihilistic. There's no

72:48

force of nihilism in the knowledge,

72:51

wisdom, and insight you get by studying

72:53

the universe.

72:55

You you will never find marching armies

72:57

led by astrophysicists to go slaughter

72:59

one another.

73:01

We the cosmic perspective prevents that.

73:08

>> The cosmic perspective.

73:10

>> Yeah. By the way, if you look at the

73:11

chapter titles in there, they're each

73:14

pairs of words that we've all used and

73:17

but we've argued over many of them over

73:20

our Thanksgiving dinner. I don't know if

73:22

there's a version of Thanksgiving in the

73:23

UK. Every it's maybe it's just

73:25

Christmas. Everybody gathers and the

73:26

crazy uncles and aunts come in and you

73:29

got to argue with them about, you know,

73:31

and you then you you're reminded why you

73:33

only see them once a year because No,

73:36

there topics in there. Color and race is

73:38

in there. Law and Order, Body and Mind,

73:42

Meatarians and Vegetarians, Life and

73:45

Death.

73:46

A lot of reflective moments in there.

73:49

So, this book though it's all these

73:51

topics that people fight about. Its goal

73:54

is to say you think that and you think

73:55

that, you got to look at it this way.

73:58

>> It's not meat in the middle. No, it's

74:02

meat on a plane of existence above what

74:05

you're arguing. and you'll look down on

74:06

what you're arguing and realize how

74:08

ridiculous it is. That's the goal of

74:10

that book.

74:12

>> Chapter 10 of the book says, "Human

74:14

physiology may be overrated."

74:18

>> What do you mean by that?

74:19

>> Well,

74:21

you know, we like to think of ourselves

74:22

at the top of

74:25

evolutionary

74:27

uh properties, but it's really your mind

74:30

surely, but not much else.

74:34

You know, we

74:37

It's odd because we always imagine

74:38

aliens having humanoid bodies.

74:41

>> Yeah.

74:41

>> And there's no reason for that if they

74:44

come from another planet. Most life on

74:45

Earth doesn't have a humanoid body. The

74:48

banana doesn't have a humanoid body and

74:50

you have DNA in common with it. You

74:52

don't have any DNA in common with an

74:54

alien from another planet. Yet, it's

74:55

walking around with a neck, eyes, nose,

74:57

mouth, head, ears, shoulders, arms,

75:00

fingers, kneecaps, feet. Really? Is that

75:05

is that is that your best imagination

75:07

that you can come up with? Alien from

75:10

another planet.

75:12

>> Is the Is the universe infinite? I've

75:14

often wondered that. Does it just go on

75:16

forever or is there a

75:17

>> We're not given reason to think it

75:19

doesn't. But our horizon has a edge.

75:22

>> What we can see?

75:23

>> Yeah. But there's no reason to think. So

75:26

you're you're a ship at sea.

75:28

>> Mhm.

75:28

>> And you have a horizon. Are you saying

75:31

that's the extent of the ocean? No,

75:34

because if you sail towards the horizon,

75:36

more horizon shows up and you keep that

75:38

up until you hit land.

75:42

So in the universe, we have our horizon

75:47

and if we went to that horizon, we'd

75:49

have a whole other horizon beyond that.

75:52

If we traveled to that horizon, be a

75:54

whole other horizon there. The question

75:56

is how how far does that go? We don't

76:00

know.

76:03

We have no idea.

76:05

It's simpler mathematically to think it

76:07

goes forever.

76:09

It's curious how there's some equations

76:10

where infinities

76:13

work just fine in the equation. Uh so we

76:16

don't know. We can talk about to our own

76:18

horizon. That's it.

76:20

>> There's so many people saying that

76:21

they've seen aliens. We had someone on

76:23

this podcast actually that said they'd

76:24

seen aliens. Not they'd seen aliens, but

76:27

they had evidence that aliens existed

76:29

and they worked in the military and said

76:31

that they'd uh you know some of these

76:33

spacecraft footage that you see from the

76:34

Navy.

76:35

>> Did they

76:36

show you the alien?

76:38

>> No, but you see the videos of the things

76:40

bouncing around in the sky.

76:41

>> Oh, fuzzy videos.

76:42

>> Fuzzy videos.

76:43

>> So those are UFOs. They're not aliens.

76:45

>> UFOs. Yeah.

76:46

>> There's a difference.

76:46

>> Oh, yeah.

76:47

>> Many people equate the two, but if you

76:49

see something in the sky and you don't

76:51

know what it is, it's a UFO. And what

76:54

does the U stand for?

76:56

unidentified.

76:58

Until you can identify it, it's a UFO.

77:01

And because it does things that you

77:03

don't understand,

77:05

you cannot equate that with it being an

77:08

alien.

77:10

You just said you don't know what it is.

77:13

Wow, that's amazing. I don't know what

77:14

it is. Therefore, it must be a alien.

77:18

If once you just said you don't know

77:19

what it is, that's the end of the

77:20

sentence.

77:22

You can't go on and say therefore it

77:24

must be anything. You can be impressed

77:26

with videos that have no explanation.

77:29

I don't have a problem with that. But

77:32

you want to turn around and say aliens.

77:34

You want to say it's a government cover

77:36

up. Do you really think the government

77:37

is that competent?

77:39

Often the same people who say there's a

77:41

masterminded government. They're the

77:42

same people who complain that the

77:44

government is a bloated bureaucracy,

77:46

inefficient bureaucracy that should be

77:48

replaced by private enterprise. They're

77:50

the same people making those same

77:52

statements.

77:54

So I I I love the aliens. I want to meet

77:56

them, too. My My people, the

77:58

astrophysics community has been

78:00

searching for aliens for decades.

78:01

>> And you've never found evidence of any?

78:04

>> Not.

78:07

So

78:09

the community of amateur astronomers in

78:11

the world, okay, amateur astronomy is

78:14

that's a badge of honor because you mean

78:15

you know the night sky and you own a

78:17

telescope, but it's not like amateur

78:19

neurosurgeon, okay?

78:22

You don't want to go to an amateur

78:23

neurosurgeon, but you want to know the

78:24

night sky, go to an amateur astronomer.

78:26

Amateur astronomers know the night sky.

78:28

They know what the sun, moon, and stars

78:30

are doing every night. They know.

78:32

They're very good at climate and weather

78:34

because that affects whether things are

78:36

visible. So, they know when weather

78:38

systems come in and go out and what

78:39

things look like.

78:42

You would think if aliens were about up

78:47

and about that amateur astronomers would

78:49

have seen more of them than anyone else.

78:52

But they've seen less

78:54

because we know what we're looking at.

78:58

It's kind of that simple. The moment you

79:00

know what you're looking at, it's an

79:01

IFO, isn't it?

79:03

>> Yeah.

79:03

>> It's not a UFO. And so, yeah, I want to

79:07

meet the aliens, but you're gonna show

79:09

me fuzzy video, or you're going to say

79:11

you have an alien, but it's in a locked

79:13

box and you're not going to show it.

79:16

If you have an alien in a lock box and

79:17

you're not going to show it, that's the

79:19

same thing to a scientist as not having

79:22

an alien at all.

79:23

>> Could you make the case for why aliens

79:26

probably do exist and also the case for

79:28

why they probably don't exist?

79:30

>> No. No, they surely exist in this

79:33

universe. The universe is 14 billion

79:35

years old and the ingredients of life on

79:37

Earth are the most common ingredients in

79:39

the universe

79:41

and life began on Earth almost as

79:42

quickly as it possibly could have.

79:45

When Earth finally cooled down after it

79:47

being formed, it was about 200 million

79:50

years first signs of single cellled

79:52

life. So even though we can't duplicate

79:55

that yet, we don't know how. That's a

79:57

frontier of biology. Earth didn't seem

79:59

to have problems getting the job done

80:01

within 200 million years. That's Earth.

80:05

Now you have exoplanets everywhere

80:07

across the galaxy to suggest that life

80:10

on Earth is alone in the universe. You'd

80:13

have to have some point of philosophy

80:14

that requires you believe that because

80:17

it's not derived from actual uh evidence

80:20

or observations of the universe itself.

80:24

So uh aliens usually people mean

80:27

intelligent aliens, but we're happy to

80:29

find any kind of life at all. bacterial

80:31

life that would be that would transform

80:34

biology.

80:34

>> What about in our galaxy in the Milky

80:36

Way galaxy?

80:37

>> Yeah, the galaxy is the most sensible

80:38

place to So, we've looked we've looked

80:40

for exoplanets. So, a planet orbiting

80:43

another star cuz you're going to look

80:45

for life. We want we presume it's going

80:47

to be on a planet. So, if this table is

80:49

the galaxy

80:51

>> Mhm.

80:51

>> and the solar system would be about

80:53

right there.

80:55

We've searched a circle about this big

80:57

for exoplanets. And what's the solar

80:59

system versus the

81:00

>> It's just the sun and its planets.

81:02

>> Oh, okay.

81:02

>> Yeah. Solar system.

81:04

>> And then that's our solar system there.

81:06

And we are part of several hundred

81:08

billion stars in the galaxy.

81:12

>> Mhm.

81:12

>> And this galaxy is one of perhaps as

81:15

many as a trillion galaxies in the

81:19

observable universe. So to say that

81:21

we're alone, that's just you're being

81:23

you're being philosophically

81:25

irresponsible. So this table is the the

81:28

galaxy.

81:29

>> Yeah. If it were the galaxy

81:30

>> and we've searched a coin

81:32

>> coin. Yes, that's a good word to use. A

81:34

coin sized volume of this galaxy. We've

81:36

searched for exoplanets and by

81:39

association life. So folks at the SETI

81:43

Institute, the search for

81:44

extraterrestrial intelligence. Uh they

81:46

come up with an analogy. But there

81:49

people have said, "Well, we haven't

81:50

found life yet, so maybe there's no life

81:51

anywhere." And we say, "No, take a cup

81:55

and scoop it into the ocean."

81:58

That's like saying, "Hm,

82:02

the ocean has no whales in it."

82:05

>> Is that the equivalent?

82:06

>> Yeah, it's equivalent in terms of the

82:08

space of of searching because it's not

82:11

only in in physical space, but it's in

82:14

time. Suppose aliens sent radio signals

82:18

to us and they arrived 2,000 years ago.

82:22

Do the Romans have radio telescopes? No.

82:25

But we would all count them as

82:26

intelligent.

82:28

So, communication requires intelligence

82:30

and technology.

82:32

How long have we had technology to do

82:34

that?

82:35

80 years.

82:37

>> On the chance of probability, do you

82:39

think there are aliens in the Milky Way

82:40

galaxy?

82:41

>> Yeah. Oh, sure.

82:42

>> You think there are?

82:43

>> I don't see why not. It's a calculation

82:45

you can do. I did it with two colleagues

82:47

of mine. We have about a hundred

82:48

civilizations in the galaxy alive. Now,

82:53

that's not many out of the total number

82:54

of stars, but again, a civilization has

82:57

to evolve out of whatever it was, and

82:59

it's a tiny little slice of time

83:02

>> relative to how long the planet has been

83:04

there.

83:05

>> 100 different living civilizations on

83:08

the word living because living can mean

83:10

many things.

83:11

>> Well, I mean, Mars might have had life,

83:15

but it would be dead today on the

83:16

surface. So, we're looking for living

83:19

civilizations.

83:20

>> And does that excite you?

83:21

>> Yes, completely.

83:23

But

83:25

you want to now tell me it has visited

83:27

you in with fuzzy lights in the sky

83:32

and no one has like brought forth an

83:34

alien. I I need better evidence because

83:36

you're making an extraordinary claim.

83:38

>> Humans fascination with meeting these

83:40

aliens when we've got crazy species

83:42

we've never met on our own planet.

83:43

>> That's a good point. And plus, what do

83:46

we need real aliens for when we have

83:47

Hollywood?

83:50

The funny part to me is we have no

83:53

knowledge

83:55

that aliens want to harm us.

83:58

>> But we do have knowledge that humans

84:00

want to harm humans. And any encounter

84:03

between an advanced civilization and one

84:06

that was less advanced in the history of

84:09

exploration has never boded well for the

84:12

less advanced civilization.

84:14

So for me, we are describing aliens

84:20

not as we think they would be, but as we

84:25

know we are.

84:27

>> Mhm.

84:28

>> To one another. It's a mirror.

84:31

>> And we've only got to play out what we

84:32

would do as well if we found an alien

84:34

civilization. What would humans do? I

84:37

mean, I think we'd go and try and steal

84:39

some of them

84:41

and bring them here. Yeah. Well, no.

84:42

They're probably smarter than us.

84:46

That's like that's like worms saying,

84:48

"Oh, we found some humans. What should

84:49

we do with them? Should we corral them?"

84:51

No.

84:53

If if aliens came here, they clearly are

84:55

more advanced than we are cuz we haven't

84:58

left low Earth orbit in 53 years. So, if

85:02

they cross the galaxy to visit us,

85:05

oh, we're going to take shoot a gun at

85:06

them. Don't laugh at us,

85:10

you know.

85:12

In all the movies though, we beat them.

85:14

That's so funny. I've never thought

85:15

about that before that. Yeah, we just

85:16

shoot guns at them.

85:17

>> You shoot guns at them and did it really

85:19

make a difference? You know,

85:21

>> we put like Brad Pitt or whoever in like

85:22

a Tom Cruz and a

85:24

>> What's your favorite space movie?

85:26

>> Space movie.

85:30

>> Well, sci-fi is The Matrix.

85:32

>> Why?

85:33

>> I love everything about it. The story is

85:35

tight. It's one physics error in it, but

85:38

without it, they don't have a movie. So

85:39

you got to give it I can write him a

85:41

hall pass which I feel

85:44

that I have the power to do.

85:46

>> What was the error? Everyone's going to

85:47

be wondering what the error was in the

85:49

>> Oh, it's not an error. It's just they

85:51

got it's bad physics in it. Okay. So if

85:55

you if you remember the AI

86:00

computer that's running everything needs

86:03

an energy source. And so they're growing

86:06

humans in these pods knowing that each

86:10

human radiates at about 80 watts. They

86:13

didn't give that number, but it's a true

86:15

fact. Uh 80 watts, like an 80 watt bulb.

86:17

That's how much energy you are consuming

86:20

and using. That's a energy rate. Okay.

86:24

So they and that's one of the writers

86:26

must have known that and said that's

86:28

kind of cool. Let's use humans as an

86:29

energy source for the machines. All

86:31

right. So they're these pods of humans

86:33

and they grow the humans from childhood

86:35

to adulthood and they put in their head

86:39

a world that they're living in which is

86:41

just in their head and they think it's

86:43

real but it's not. That's the matrix.

86:47

Okay. But wait a minute, how do the

86:50

humans get their energy?

86:53

They feed the humans food.

86:57

Well, why are you feeding food to humans

87:00

and then using the energy from the

87:01

humans for the machine? Bypass the

87:03

middleman and just feed the machine.

87:07

Something called the second law of

87:08

thermody first or second law of

87:10

thermodynamics. Anytime energy changes

87:12

from one form to another,

87:15

it's not 100% efficient. You drive a

87:18

car, if you drive a combustion engine

87:19

car, you drive it 50 miles, get out, the

87:22

engine's hot.

87:25

Where' the heat come from? That's wasted

87:27

energy converting chemical energy of the

87:30

gasoline to kinetic energy of your car.

87:34

It is never 100% perfect. So they are

87:37

losing energy in with this middleman and

87:39

they should just feed themselves

87:41

whatever the food they're feeding the

87:43

humans. And

87:46

if they're smart, they would not have

87:47

humans at all. But then there's no

87:50

movie. So that's my point. Rode him a

87:53

hall pass. You're okay with that. Are

87:55

you an easy person to watch movies like

87:56

this?

87:57

>> Yeah, I'm not I'm not that I'm not the

87:59

guy you think I am. I will watch it and

88:01

silently Yes, I'll I'll gather a list of

88:04

but I'm silent about it. And if you're

88:06

interested, I will tell you later.

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What's the one outstanding question, if

90:14

there is one,

90:16

>> that you're desperate to know the answer

90:17

to? I don't live life that way.

90:20

>> Really?

90:20

>> Yeah. It's a sensible question that

90:22

you're asking me. I don't want to

90:23

diminish the sensibility of it, but I

90:26

want to say that that's not how I view

90:29

the world. The world is not there's the

90:33

one question I need answered. the world

90:35

is

90:37

what do I need to learn

90:40

so that I'm standing in a place I can

90:43

yet imagine

90:45

asking a question I have yet to think of

90:50

in other words as the area of our

90:52

knowledge grows

90:54

so too does the perimeter of our

90:56

ignorance

90:58

and so you say what one question no

91:01

there'll be a bunch of questions the

91:03

area grows some more. I'm standing in a

91:05

new place now. There's a question I

91:07

didn't even think could be asked before

91:10

and that's the question that matters

91:12

there and then. But then there's another

91:14

question later on as this frontier

91:17

continues to advance. So I don't think

91:20

about the one question or the two

91:21

questions that matter. I think about

91:24

questions yet to be dreamt of that we

91:28

don't even see because we haven't taken

91:31

the frontier to that vista yet.

91:34

And so yeah, it's some of that that's

91:36

unknowable, but I kind of like that

91:39

there's the German poet Rainor Maria

91:41

Rilkkey. One of the poems, I don't

91:43

remember all the lines, but the one that

91:45

matters to me most is learn to love the

91:48

questions themselves.

91:51

You're trying to find answers and I'm

91:53

trying to find the questions.

91:56

>> Learn to love the questions themselves.

91:58

This kind of brings me back to the top

91:59

of the conversation where I was talking

92:00

about I've got a lot more questions

92:03

these days.

92:04

>> That's good. Love it.

92:05

>> Sometimes it's difficult

92:06

>> and not all questions can be answered

92:09

given the state of knowledge. Some

92:11

questions are illegitimate questions.

92:13

Not all questions are legit questions.

92:15

For example, at what temperature does

92:18

the number seven melt? What kind of

92:21

cheese is the moon made out of?

92:25

These are just because the nouns and

92:27

verbs are lined up and there's a

92:28

question mark doesn't mean the and by

92:30

the way when you're in the facing the

92:33

unknown you don't know if your question

92:36

later on would look that ridiculous.

92:39

>> What separates the great scientist from

92:40

the average scientist is that they

92:42

queued into what questions to ask.

92:45

>> Do you think we hurt ourselves by asking

92:47

these invalid questions?

92:48

>> No. No. You need you don't know if it's

92:52

invalid. like the

92:53

>> I know the moon is not made out of

92:55

cheese today.

92:57

I know that because we've been there. We

92:59

brought back moon rocks. So today that

93:01

question is invalid. But if you never

93:04

imagine ever going to the moon and you

93:06

don't know anything about physics or

93:07

rocks and you look up and it looks like

93:09

a hunk of cheese you're eating, it's a

93:11

completely legit question. There's a bit

93:13

of a there is a bit of a conversation

93:15

raging in my friendship circle at the

93:16

moment about religion and meaning and

93:18

what's the point. Should we be arguing

93:21

about these these things about meaning

93:24

religion? Is there any is there any

93:25

benefit?

93:26

>> I think meaning is a very personal thing

93:27

to people. So why should you jump in the

93:30

middle of their attempt to establish

93:32

meaning in their life? We're all very

93:34

different people. And so meaning ought

93:37

to be different. If meaning was the same

93:38

for everyone, you just publish it,

93:40

everyone reads it, and we all have

93:41

meaning. No, you got to

93:45

make it yourself. Some people want to

93:46

search for it. Fine. I don't have a

93:48

problem with that. I'm not searching for

93:49

meaning. I'm creating meaning in my life

93:52

because I can control that. Not that

93:55

it's important to control everything.

93:57

Uh, you know, I I like magic as an adult

94:00

because it reminds me I can still be

94:02

fooled. Okay. That's so I don't I don't

94:06

need to know everything. I just need to

94:09

maintain curiosity.

94:10

>> And you've got kids, so

94:13

>> 29 and 25.

94:14

>> Is that the most meaningful thing you've

94:16

done in your life? raising kids.

94:18

>> Yeah.

94:19

>> Uh it's among the more meaningful things

94:21

that I would say they did a lot of their

94:23

own raising because they're highly

94:24

independent and so there's a limit to

94:28

how much I should take credit for who

94:30

and what they have become. They're a lot

94:32

of what they did themselves. But my wife

94:36

who's a science scientist, she's a

94:39

mathematical physicist. We we made sure

94:42

that both our kids were scientifically

94:44

literate at an early age. by age 13

94:48

certified. So at that point I said I

94:51

don't care what grade you get from now

94:53

on. I don't care. I know no one will

94:55

exploit you for your lack of curiosity

94:59

and knowledge about the the objective

95:02

universe.

95:04

>> And you know we'd be at a a dinner party

95:06

and they're like they're in middle

95:09

school, right? and someone says, "Oh, I

95:11

had a bad day cuz Mercury was in

95:13

retrograde." And and and my son would

95:16

say, "What actually happened to you

95:19

today?" Has that happened on days when

95:21

there was they know how to ask

95:22

questions? Okay. By the way, if you just

95:25

reject what someone says outright,

95:28

that's as intellectually lazy as it is

95:31

to accept what they say outright. Mhm.

95:34

>> What's harder, but I think more fun is

95:37

lining up a series of questions to probe

95:40

the statement to explore

95:44

what is going on in the thoughts and in

95:46

the claims of the person with whom

95:48

you're conversing.

95:50

So if someone says, I have these

95:52

crystals, you rub them together, it'll

95:53

heal you. My kids would say, what are

95:56

the crystals made of? And what tests

95:59

have you made for this? and could be

96:02

could the healing have been explained in

96:04

another way and in what way are the and

96:07

they start asking these questions and

96:08

then the person will probably just walk

96:10

away because they would not have the

96:12

answers to all of them and then you know

96:14

that's remember I said if an argument

96:16

lasts more than 5 minutes then both

96:17

sides are wrong the person would there's

96:19

nothing there's no place for that to go

96:22

to the truly curious person here's

96:24

another interesting fact crystals

96:26

represent the lowest energy state of the

96:29

atomic or molecular configuration that

96:32

it's comprised of the lowest energy

96:34

state. So people say I have crystal

96:36

energy. No, you don't. You have the

96:38

lowest energy state of that of that

96:40

silicon dioxide that you're calling

96:42

quartz. There is no there's no energy

96:45

you're going to take out of it. It is in

96:46

its lowest energy state. These are

96:49

people who have never had chemistry. And

96:51

and as an educator, I I don't want to

96:53

make fun of this, but when people think

96:56

they know something and are audacious

96:58

about it, when in fact they don't, that

97:01

makes it much harder for an educator to

97:03

break through.

97:05

>> Horoscopes.

97:09

>> Yeah.

97:11

>> Well, I've got some stats for you here.

97:12

Sure, Neil. Surveys find that roughly

97:14

80% of Gen Z believe in astrology to

97:17

some degree. Mhm.

97:19

>> 72% of those Gen Z and millennials

97:21

allowed astrology to influence major

97:23

life decisions like romance, health,

97:24

work,

97:25

>> and education. And many Gen Z's now are

97:29

checking their horoscopes weekly.

97:31

>> Yeah. I we live in a free country. So I

97:34

don't I'm not going to try to stop them.

97:37

Uh what would be sad is if that number

97:40

got to 100%. And then then you wouldn't

97:43

be generating scientists or engineers or

97:45

people who the objective truths of the

97:48

world matter. And then the civilization

97:52

just goes back to the cave where

97:54

everything that happened in the natural

97:56

world was mysterious

97:58

created by forces beyond our knowledge

98:00

and understanding. And

98:03

uh this is the the title of one of Carl

98:06

Sean's books, The Demon Haunted World.

98:09

Science as a candle in the dark. That

98:12

was the subtitle of that book. So if you

98:16

want to think you're not in control of

98:17

your fate because the sun, moon, and

98:19

planets are. It's like I said, it's a

98:22

free country.

98:22

>> Is there anything that you've learned

98:24

that the universe does to influence us?

98:29

>> Yeah. The sun rises and I wake up

98:30

because I want to be awake during the

98:32

day. Yes.

98:33

>> That people aren't.

98:34

>> Yeah. The tide comes in and I move my my

98:36

my my beach chair back because the tide

98:40

came in. Yeah. There are things that

98:43

influence my behavior. Yes.

98:48

But it's not much more than that.

98:51

Uh earth is tipped on its axis. So we

98:53

have seasons. I buy coats and wear them

98:55

in the winter. That influences my

98:56

behavior.

98:58

What's your star sign?

99:01

>> Well, I once had someone take a class of

99:03

mine at the Hayden Planetarium that I

99:05

taught on astrophysics. And at the end,

99:08

she like the second to last class, she

99:11

came to say, "Oh, thank you. Thank you

99:12

for the class. I enjoy I'm enjoying the

99:14

class, but I want you to know I'm an

99:16

astrologer and I'm taking the class so I

99:18

can cast horoscopes better." So, I said,

99:21

"It's really working for you?" She said,

99:22

"Yeah, yeah, yeah." She said, "For

99:24

example, what's your horoscope sign?"

99:26

And I said,

99:29

"Shouldn't you be able to figure that

99:30

out?

99:33

If all this works and you cast

99:35

horoscopes, you ought to tell me what my

99:38

sign is." She said, "Okay, okay." And

99:40

she said, "Are you Gemini?" I said,

99:41

"No."

99:44

"Cancer?" That's I said, "No." "Uh, it

99:47

must be Leo." I said, "No." Eight

99:50

horoscopes later,

99:52

she gets the correct answer and says, "I

99:54

knew it.

99:56

So, I'm simply saying that

100:01

her ninth guess out of 12 was correct

100:05

and she declares, "I knew it."

100:08

>> Why do people want to believe in things

100:10

like this?

100:11

>> I I think they want the world to still

100:15

have mysteries because mysteries are

100:17

beautiful things. However,

100:20

the world still has mysteries. They're

100:21

just different mysteries from whatever

100:23

there used to be. And so follow the

100:27

mysteries where they take you. And

100:29

there's another branch of all of us who

100:31

must have answers to every question

100:34

because they're not learning to love the

100:36

questions. They only want to love the

100:37

answer. So they say, "What was around

100:40

before the big bang?" I said, "I don't

100:41

know. We got top people. Something had

100:43

to be around." I said, "I don't know.

100:44

Must have been God." So there's their

100:46

answer that then they're happy.

100:49

What happens after death? Well, it looks

100:51

like you rot in the ground, but

100:53

otherwise, and that's what physics, it's

100:55

got to be something your soul. I said,

100:57

there's got to be the go heaven. Okay,

100:59

that's their answer. They've got their

101:01

answer. And if that's your answer, at

101:04

every turn, you you make a you're not as

101:06

good an investigator of the unknown

101:09

because you just invented the answer to

101:11

the unknown. You're content. What is

101:13

dark matter? Dark? I don't know. We got

101:15

top people working. Is that the the

101:17

spirit of God?

101:19

Okay.

101:21

then that person won't walk into a lab

101:23

to continue to study what dark matter

101:25

and dark energy is. I don't mind if you

101:27

want to say it's God, but don't let that

101:29

stop your curiosity. But if you say it's

101:31

God and then you're done, then you're

101:33

not very useful in the lab.

101:36

>> Those people seem to be happier and

101:38

healthier, though, which is the

101:39

surprising thing. Religious people.

101:41

Well, again, so it it could be because

101:43

they believe there's a God that tells

101:45

them who to sleep with and where to eat

101:46

and how to pray, or because they have a

101:49

regular dose of community.

101:53

I don't know that those are completely

101:54

separable variables. There are people

101:57

who they love and care about that they

101:58

see every week, which is not happening

102:00

with so many people today.

102:02

>> Do you think you would be happier if you

102:03

believed in God?

102:05

>> I'm a pretty happy guy.

102:07

>> Do you think you'd be happier?

102:09

>> I don't know. I see people I've seen

102:11

very happy people in uh celebrating

102:15

their version of God. But then there are

102:18

other people who really happy in their

102:19

version of God. And here's the problem.

102:23

Deeply religious people

102:26

typically find other religions

102:31

deeply religious people will declare for

102:33

themselves and others in that religion

102:35

that all the other religions are false.

102:37

>> False. And if not false, just make

102:40

preposterous claims. It is so obvious to

102:43

them how false all the other religions

102:46

are. Now you go to this religion. It is

102:49

obvious how preposterous the rest of the

102:51

religions are. You go around religion to

102:53

religion.

102:55

And

102:58

so what's really going on here is devout

103:00

people in so many of these religions are

103:02

atheists

103:04

to every religion but their own.

103:08

every religion but their own. Okay. How

103:11

can a mountain have moved to Muhammad?

103:13

That can't be. Okay. Oh, but yes, the

103:16

creator of the universe impregnated a

103:18

woman in the Middle East 2,000 years

103:21

ago. That's more believable than

103:23

anything in the Quran for this person.

103:26

Okay. And then the Jews are saying,

103:28

"You're Jesus is the son of God. What?

103:30

You are you crazy? Where'd you get that

103:32

from? He's a good Jew, nice prophet, but

103:35

son of God, you're going too far." So

103:37

everybody's saying what's not true. So

103:40

they're atheist for every other they

103:42

just don't believe any other religion.

103:44

Whereas an actual atheist just has one

103:47

more religion to that category.

103:50

It's your religion.

103:52

The atheist agrees with you that all the

103:54

other religions are preposterous in

103:56

their claims.

103:58

But they also believe they also think

104:00

your religion is preposterous. And

104:03

people don't accept that. they don't it

104:06

doesn't land well. So I don't have any

104:08

problems with people being religious. I

104:09

don't have any issues with that. It's um

104:13

I don't try to impose my I other people

104:16

try to do it. I've seen them do this. I

104:20

have a quote where I'm misqued just

104:23

because they want me on their side.

104:26

Okay, you ready? It's a simple quote.

104:31

If every time I tell you science doesn't

104:34

understand it and you say well God must

104:36

be that God made the universe because we

104:39

don't God made life because we don't

104:40

know how to make life yet. God. If

104:42

that's if that is your definition and

104:45

understanding of God,

104:48

then as science progresses, it will

104:51

solve these questions,

104:55

pushing the God back outward

104:59

to places that have yet to be

105:01

discovered. And so the quote is, "If to

105:05

you God is where science has yet to

105:07

tread,

105:10

then God is an ever receding pocket of

105:13

scientific ignorance."

105:17

That's that that references what

105:19

philosophers have called God of the

105:20

Gaps. It goes way back thousands of

105:23

years. We don't understand it. There's a

105:25

God. The storm is Poseidon. Okay?

105:28

Lightning bolt struck. It's Zeus. All

105:30

right? That's God of the Gaps. God of

105:32

the gaps is a timehonored exercise in

105:36

human civilization. And all I'm saying

105:38

is that statement

105:42

is objectively true because it's an if

105:44

statement.

105:46

If to you God is where science has yet

105:49

to tread, then as science continues to

105:51

tread, you're a pocket, a shrinking

105:53

pocket of scientific. That's your God.

105:57

Okay? It's not an opinion. There's a

105:59

statement of an if statement. The

106:01

consequences of an if statement. I've

106:03

had people take the second half and put

106:04

it on a t-shirt.

106:07

God is an ever receding pocket of

106:09

scientific uh ignorance. Neil deGrasse

106:12

Tyson is not what I said.

106:15

That's half of what I said. And that's

106:17

only true if to you God is where science

106:20

has yet to tread. But to pull that out

106:22

and make that the truth, no. I would

106:25

never make such a statement ever. You're

106:28

66, right?

106:30

>> Hang on.

106:31

>> Hang on.

106:33

>> I will be 67 in a month. In a month.

106:37

>> Okay. So, you're

106:37

>> a month from this recording.

106:38

>> So, I'm 33.

106:40

>> Okay. Half my age.

106:41

>> Exactly half. I I was wondering, you're

106:44

a very wise man. What is the advice that

106:48

you wish someone had said to you at 33

106:52

that you could give to me now?

106:54

>> I have no such advice, and I'll tell you

106:57

why.

106:59

If you're alert and you're smart, alert

107:02

meaning you notice things and you're

107:03

you're smart and you you learn

107:14

living life itself

107:17

is the lesson.

107:20

So if so a version of what you just

107:22

asked is what given what you know today

107:25

what would you tell yourself if you met

107:27

yourself when you were 15 20 25 30

107:30

whatever and I said I wouldn't tell him

107:32

anything

107:34

because if I gave a bit of wisdom

107:37

to I say you're about to do that but

107:40

don't do that. Okay.

107:43

There's no better lesson than doing

107:45

something and learning that you

107:47

shouldn't do it. That's the best lesson.

107:51

We don't live life because there's a

107:52

list of things that other people said

107:54

don't do. You're going to explore your

107:56

life. That's what you're going to do.

107:59

And some things are great and some

108:00

things you don't want to do again. Some

108:02

things you're bad.

108:04

That's where the wisdom comes from.

108:08

You earn it.

108:11

It's the most It's the most It's the

108:14

strongest kind of wisdom you can have,

108:16

provided you learn from a mistake. If

108:19

you're just an idiot and you just keep

108:20

making the mistake, my advice for you is

108:23

don't make the same mistake twice. But

108:25

that's you don't need me for that.

108:28

So, you'll make a decision about this

108:30

podcast or some business decision. And

108:32

no, it didn't turn out right. Here's a

108:34

better example of this. You ready?

108:36

>> This is a very American kind of story

108:38

I'm about to tell. immigrant comes over

108:41

back when that was a thing you could do.

108:43

Comes to the United States and they work

108:46

hard, very hardworking.

108:50

They first sweep the the street in front

108:52

of a store up front and then they're in

108:54

the store and they learn the trade and

108:56

then the owner dies and they take over

108:58

the trade and they're working hard and

109:00

they're scrapping and they and then they

109:02

buys the adjacent store and they build

109:04

the thing and becomes and then he moves

109:06

and he lives in a big house and he has

109:08

kids. Okay.

109:11

And he says to himself,

109:15

"When I was your age, I had to like

109:19

scrge for food and I had to like sweep

109:22

things and I want to make sure my kids

109:25

don't have to do that.

109:28

I want to make sure they don't have to

109:29

do that." Okay? So, you provide

109:33

things for them so they don't have to do

109:36

this. And now they grow up and they're

109:38

adults

109:40

and they're dead beats.

109:43

They have no motivation. They have no

109:45

ambition. They have no vision statement

109:49

because everything got handed to them.

109:51

And what what does the adult say to the

109:53

kids? Where did I go wrong? I gave you

109:57

everything I didn't have.

110:00

That's where they went wrong. Because

110:02

they gave the kids everything he didn't

110:04

have. And what made that person was what

110:07

they struggled, the the decisions they

110:09

had to make, the decisions they got

110:10

right, the decisions they got wrong, who

110:12

they met, how they treated people. This

110:15

is life experience.

110:17

And it doesn't come on a bumper sticker.

110:20

Doesn't come on a what's the secret?

110:23

Just like going to someone's home and

110:25

one of the one of the hosts is a is

110:28

actually a trained chef, right? and

110:30

maybe worked in a restaurant and they

110:31

prepare this exquisite meal and you said

110:34

this is delicious.

110:36

What's your secret?

110:39

Oh, the secret? I went to chef school

110:42

for six years. That's the secret. You're

110:45

thinking this is one sentence I could

110:47

tell you and then you that'll make

110:49

everything better. No. No.

110:53

Just stay alert. Learn new stuff every

110:56

day and learn from your mistakes because

111:00

those lessons are greater

111:02

than someone just telling you to not do

111:04

it.

111:06

Then you have no such life experience to

111:09

build into the wisdom that you want to

111:11

acquire in the years to come.

111:14

>> My last question for you is and I I hear

111:16

it the

111:16

>> I didn't think you'd ever have a last

111:18

question.

111:20

>> No. Yeah. I mean for now I should say my

111:22

last question for now but um my last

111:23

question for now and I kind of hear it

111:25

in between some of the things you say is

111:27

and I've just moved here so I've just

111:28

moved to Los Angeles. How do you feel

111:30

about America right now?

111:33

Well, you know, it's a free country and

111:35

we vote in our leaders and right now

111:38

there's a whole set of people in charge

111:41

that are doing different things from

111:42

what had happened in previous

111:45

uh years, previous leaderships, even

111:48

previous leaders of that same political

111:50

party. The what's going on is very

111:52

different from anything that I think

111:54

people would have predicted. A lot of

111:56

people like

111:58

complaining about leadership, but we

112:01

live in a country where we choose our

112:03

leaders. So, we're going to complain

112:04

about the leadership. You should be

112:06

complaining about the people about the

112:08

electorate. I'm an educator. I I've

112:11

never I I've never

112:17

complained about politicians.

112:19

They represent people. I was once in the

112:23

Rayburn office building, Washington DC,

112:26

in the science committee's room,

112:29

beautifully decorated with science um

112:32

art and sculptures and things. One of

112:34

the members of the science committee

112:36

back then was a young earth creationist.

112:41

Young earth creationists. Universe

112:43

created in six days, earth created in

112:45

6,000 years. At most, 10,000 years. And

112:48

I knew he was going to be there. And I

112:50

thought to myself, do I grab him by the

112:52

lapels and say, "What are you thinking

112:54

on his science comm?" And then I

112:55

thought, "No, no.

113:00

If he thinks that, presumably, so does

113:03

his electorate.

113:05

>> They voted him in.

113:08

And this electorate of fellow citizens,

113:10

as am I in this country, so I can't

113:13

indict him. Let me go have a

113:15

conversation with the folks who voted

113:17

for him." I said, "Why do you think

113:19

this?" and you would consider this and

113:21

that's my duty as an educator not to hit

113:23

anybody on the head who's in Washington.

113:25

So, do we blame the educators and the

113:27

media people like you know people like

113:29

me that

113:30

>> No, I that's the blame game is I don't

113:34

feel that way.

113:36

My parents when we they showed us the

113:38

images

113:40

of the dogs and the water hoses on the

113:43

protesters and in the south American

113:45

South

113:47

they were never bitter. They said these

113:50

people don't know any better. They don't

113:53

know any differently. you have to talk

113:55

to them and

113:57

you know teach them. That's very

113:59

different from saying holding up your

114:01

fist saying I'm going to fight them

114:03

because they're my enemy.

114:06

It's I want to teach them because

114:07

they're my fellow citizens.

114:10

And that's how I feel. So my worry is

114:14

that there are decisions made that are

114:17

not in the best interest of the people

114:18

who voted for those decisions. the

114:20

longer term implications are um could be

114:24

devastating if you cut basic science.

114:27

Basic science feeds engineering.

114:29

Engineering feeds economies. And so if

114:32

you don't think basic science matters

114:34

because you don't either understand the

114:36

title of the research or the scientists

114:38

didn't communicate it interestingly

114:40

enough, whatever, and you say this is a

114:43

waste of money, take it all out. Let's

114:44

just do the engineering. You'll be

114:47

oified in place.

114:48

>> And is that what's happened? We are on

114:50

the brink of that happening right now.

114:51

That's correct.

114:52

>> The average person has no idea about

114:53

this.

114:54

>> I've tried to, you know, illuminate the

114:57

public about it. It's easy to say that

115:00

basic science doesn't matter or can't

115:02

matter or will never matter because we

115:05

don't know yet.

115:07

Right now is the centennial decade. So

115:10

let's go back to the 1920s where quantum

115:12

physics was developed.

115:15

If you were around back then, what would

115:17

you have said? Why are you studying

115:18

atoms? who can't even see atoms. Don't

115:20

waste your time. You're a brilliant

115:21

person. Go work on this other problem

115:23

that we have in society.

115:26

And it would take decades.

115:30

But the information

115:34

technology revolution

115:39

has as its core

115:41

the creation, storage, and retrieval of

115:44

digital information. that can only

115:46

happen with the exploitation of the

115:49

quantum.

115:50

So this decade of science physics that

115:53

was discovered by the 1950s it was like

115:57

whoa this is some important physics

115:59

here. No one would have known that at

116:01

the time.

116:03

Why?

116:04

Let me keep going. Was it 1876 uh

116:08

Philadelphia Expo?

116:11

Alexander Graham Bell showcases his new

116:14

contraption, the telephone.

116:18

And people say, "Wow, this is kind of

116:20

cool. You should read what people wrote

116:21

about it. This is a great invention. I

116:23

can imagine there might be one in every

116:26

city in the future.

116:31

in this book

116:32

>> uh the uh that one. Yeah.

116:34

>> There's a whole chapter called science

116:36

and technology

116:38

where I chronicle

116:40

I chronicle

116:42

how people think about the technology of

116:45

their day and how they always get it

116:47

wrong when they predict the future

116:51

because foundational science comes in at

116:53

the bottom and you don't see that coming

116:55

and it gurgles its way up. Clever

116:57

engineers apply it and then

117:00

You have an iPad.

117:05

>> Neil, thank you so much.

117:06

>> Well, thanks for for having me back.

117:08

This is our second time together. It

117:10

>> You bought out the bookstore here. What

117:11

did you do?

117:12

>> Yes. We wanted to to come prepared. I

117:13

mean, you have you write the most

117:15

incredible books. Um, and you talk in

117:18

the most incredible ways. I said this to

117:19

you last time, but you're one of the

117:20

most incredible storytellers I've ever

117:22

heard. you make something which is I

117:24

really didn't have a huge amount of

117:25

interest in in school suddenly

117:26

interesting to us as adults which is a

117:29

remarkable thing.

117:30

>> So thank you for doing what you do. We

117:31

do have a closing tradition where the

117:33

last guest leaves a question for the

117:34

next guest.

117:34

>> Oh, is that right?

117:35

>> Yes. Okay.

117:36

>> And they don't know who they're leaving

117:37

it for. The question left for you is how

117:39

good are you at knowing

117:42

what you will regret and is there

117:45

anything you do regret? Yeah, I think

117:48

regrets are things that you only realize

117:51

when it's too late. Otherwise, you would

117:53

have preempted it and not have to regret

117:56

it. So,

117:58

uh I don't know that I'm any better than

118:00

anyone else at it. Cuz if you're good at

118:03

it, you'll never be in a position to

118:05

have to do something that you would

118:06

regret. The fact is you went past

118:09

something that you did and say, "Damn, I

118:11

shouldn't have I got to regret that." So

118:14

I to be good at knowing in advance that

118:16

you're going to regret something. That's

118:18

almost an impossible scenario. If I'm

118:21

good at seeing it, then I would never

118:23

have to regret anything because I would

118:24

have preempted it. So for all of us, the

118:27

fact that we have regrets is we move

118:29

past something that we did. It was like,

118:31

damn, I I regret that after the fact.

118:34

>> Do you have any regrets?

118:36

Uh I was a a

118:40

uh in college

118:43

I majoring in physics and I think I was

118:45

a junior. There were students that came

118:47

in from other schools for a summer

118:51

program.

118:51

>> Mhm.

118:52

>> Okay. High school seniors. I think they

118:54

were uh they might have been freshmen in

118:56

their college but I think they were high

118:57

school students. And I was a men not a

119:00

mentor but I would guide them in these

119:02

research projects. Then at the end we

119:04

had to write an evaluation of them.

119:08

And there's one student I wrote an

119:11

evaluation that

119:13

was accurate

119:15

but

119:18

unnecessary.

119:22

I said he pretends he knows things that

119:26

he doesn't and he's, you know, he's

119:30

faking this and he's and I didn't yet

119:34

know

119:36

how to speak encouragingly about someone

119:41

separate from just speaking factually

119:43

about someone.

119:46

So, is that an art? Is it a science to

119:49

do that? I don't know, but I know I

119:51

didn't have it at the time. I just

119:53

simply described what I saw and I said

119:56

he, you know, he this is not going to

119:58

work. He this this it was very deflating

120:04

>> to him.

120:05

>> Mhm. And

120:08

uh considering that at the time I'm

120:11

majoring in physics at Harvard, he's

120:14

coming from some

120:16

high school somewhere and I'm a Harvard

120:19

student telling him that, you know, he

120:21

ain't and I should not have done

120:24

that.

120:25

>> Did he contact you later?

120:27

>> No. He might have taken up another

120:30

field. I don't know. But so I I regret

120:32

that. But it would take me four years to

120:34

even realize that that was a regrettable

120:36

thing because I didn't know how to, you

120:40

know, as an educator, you want to

120:42

encourage people. You see where the

120:44

weaknesses are and figure out ways to

120:46

have that person eradicate them, improve

120:49

upon them, rather than just say, "This

120:52

is not working. Go home."

120:54

>> Why? Why?

120:55

>> I regret that. And that's probably the

120:57

thing I regret most in life.

120:59

>> Really?

120:59

>> Yeah. because it was who knows what

121:03

consequences that has on that person's

121:05

life.

121:05

>> And you remembered that.

121:06

>> Oh yes. Oh my gosh. Yes.

121:10

>> What how how do you remember that? Cuz

121:12

you wrote you write it down in his

121:13

report card or whatever on this

121:14

assessment.

121:15

>> Time goes on. Does something happen for

121:18

you to think back to what you wrote?

121:21

>> Uh well, I've written many letters of

121:23

reference for people, more than I can

121:25

count. Mhm.

121:26

>> So I think every time I write a letter

121:28

of reference, I think about how I could

121:30

have written that letter back then.

121:32

That's a regret

121:34

and I live with that.

121:36

>> I can see you live with it.

121:37

>> Yeah. So I think I made up for it

121:41

>> just in how many people and there are

121:43

other people who needed help and so you

121:46

find out how they can improve it and

121:47

advise on that so that everybody lifts

121:50

up. That's how you make a better world.

121:53

And it goes back to what you said at the

121:54

start. You wanted on your tombstone,

121:56

which is certainly something you've

121:57

already done in droves more so than I

122:00

think anybody.

122:01

>> So you tell me I can die now. Is that is

122:02

that what you just you just said that?

122:04

>> Or you can go on holiday or

122:06

>> it's up to you. Um but thank you so much

122:08

for being who you are. You're a huge

122:10

inspiration to me. I know Jack is a mega

122:12

mega fan of yours as well and has um

122:14

loves your work and you're the both the

122:16

reason that I

122:18

>> well I I I let go of my religious belief

122:21

at 18 years old

122:22

>> and I don't blame me for that. I don't

122:24

want you to lose your religion because

122:25

of me. No, but I just said I let go of

122:27

my religious belief at 18 years old and

122:29

I became atheist agnostic. Then I became

122:31

really agnostic. But then I kind of fell

122:32

in love with the universe and I fell in

122:34

love in the universe because of you and

122:36

because of Cosmos, which is one of my

122:37

favorite things ever to watch. and I

122:39

found all the curiosity and awe and

122:41

magic that I needed to find by by

122:44

reading your work and watching the the

122:46

wonderful movies that you've made. So,

122:47

thank you so much for that.

122:48

>> Well, the universe is a rich repository

122:51

of

122:54

spiritual fulfillment.

122:55

>> Yeah.

122:56

>> If I may.

122:57

>> Yes. To say the least. Yeah. Wow. And

122:59

your book is exactly that. I highly

123:00

recommend everybody goes and checks it

123:02

out. It's out on I think it's the 21st

123:03

of October.

123:04

>> Oh, yeah. Yeah. The the the next

123:06

installment in Merlin. Yeah. In October.

123:08

Yeah. I'll link it on the screen. I'll

123:10

link it below. Highly recommend.

123:11

>> It's called just visiting this planet.

123:13

So, so I'd lied before. I can give you

123:15

some advice.

123:16

>> Please. Ready?

123:17

>> Yeah.

123:17

>> This is 67y old advice.

123:19

>> Yeah.

123:20

>> At no time

123:23

should you

123:25

overvalue

123:29

your own thoughts.

123:34

You should you should

123:38

you should allow yourself to be humbled

123:41

daily with new ideas that challenge any

123:45

or everything that you currently think.

123:51

That's wisdom. I think

123:53

>> how do I know who I am if if I don't

123:55

hang on to

123:56

>> maybe you're not maybe you only are who

123:58

you are on your deathbed because then

124:00

you would have completed your life.

124:02

You're still in your work in progress.

124:05

You're 33. So last year when you were 31

124:09

you would have lived your billionth

124:10

second.

124:12

>> Okay. And if you if you lead a a healthy

124:14

life you should get three billion

124:15

seconds out of it. You get to 93 at

124:18

least that. So time passes. If you learn

124:23

something new every day, that forces

124:25

extra context for extra perspective, new

124:28

perspective on whatever you knew

124:30

yesterday. You have to stay open to

124:32

that. And I read old science books

124:36

because I watch people's confidence that

124:38

they had in what they thought they knew.

124:40

It can be embarrassing in some cases.

124:43

And it's very humbling

124:44

>> to look back at people writing about

124:47

their own world.

124:48

There's a book from 1899 the guy said on

124:51

the sun and it says we've learned so

124:53

much about the sun in the last three

124:55

years I had to up the edition of the

124:57

book I wrote three years ago and I'm

124:59

saying you don't know about the sun

125:02

okay uh in 19 in 1899 but he's feeling

125:06

it he's feeling that joy and so I it

125:11

it keeps me humble on the frontier

125:15

on this perimeter of ignorance

125:17

>> because there's way more to discover

125:19

than anything you've already learned.

125:22

>> Maybe that's the antidote in medicine

125:24

that society needs right now, too.

125:26

>> I think so, cuz everybody is running

125:29

things thinking they know better than

125:30

everybody else.

125:33

[Music]

125:44

Happy birthday.

Interactive Summary

This video features a deep conversation with astrophysicist Neil deGrasse Tyson, covering a wide range of topics including the cosmic perspective, mortality, the nature of belief, and the impact of technology. Tyson emphasizes the importance of objective truth, the value of lifelong learning, and the need for humility in the face of the vast, evolving knowledge of the universe. He also shares personal reflections on grief and offers perspective on the future of humanity's place in space.

Suggested questions

5 ready-made prompts