Cosmic Queries – The Deep

29 Aug 2025 · 47 min

Ask about this episode

Ask anything about it. ChatGPT or Claude reads this page and answers with the times it was said.

Connect VO and ask about every podcast you hear, including the moments you saved. Add to ChatGPT · Add to Claude

In short

StarTalk Radio - Episode Summary: Cosmic Queries – The Deep

Podcast Overview Title: StarTalk Radio Host: Neil deGrasse Tyson Co-Host: Chuck Nice Description: Science, pop culture, and comedy collide as Neil deGrasse Tyson and his guests explore various topics in astronomy, physics, and life in the universe. Episode Date: September 27, 2019

Episode Description In this episode, titled "Cosmic Queries – The Deep," Neil deGrasse Tyson and Chuck Nice dive into profound questions submitted by fans. They explore themes about existence, the universe, and the human experience, discussing ideas that challenge our understanding of reality and intelligence.

Main Themes and Key Discussions

  1. Endless Space vs. Endless Time
  2. Question Raised: What boggles your mind more: the thought of endless time or endless space?
  3. Neuroscience Frontier: Tyson mentions the exploration of whether the human brain can comprehend the human mind, leading to discussions about consciousness and intelligence.
  1. Humanity's Place in the Universe
  2. Sagan's Statement: "Humans are the universe's way to understand itself." Tyson argues against placing humans at the center of intelligence.
  3. Comparison with Chimpanzees: Tyson compares human intelligence to that of chimpanzees, suggesting that a slight difference in intelligence might mean higher forms of intelligence exist that we cannot conceive of.
  1. Simulation Hypothesis
  2. Speculative Thought: The idea that humans could be part of a simulation created by a more advanced intelligence, akin to a child's play or a video game where real-world events are manipulated for entertainment.
  1. Purpose of Science
  2. AlexGreg56's Question: If the universe doesn't have to make sense to us, what is the point of science?
  3. Tyson argues that while our senses are limited, science provides tools to explore and decipher truths about the universe beyond our sensory limitations.
  4. He refutes the notion of “God works in mysterious ways” as a closure to inquiry.
  1. Human Survival and Intelligence
  2. Longevity of the Species: Discussing how long humans might survive, Tyson suggests that while we have the potential for a long future, our intelligence may also lead to our self-destruction through various means.
  1. Creating Meaning in Life
  2. Tyson’s Philosophy:
  3. He emphasizes that instead of seeking meaning, individuals should create their own meaning through actions that lessen the suffering of others and foster continual learning.
  1. Understanding the Vacuum of Space
  2. Definition of Vacuum: Tyson explains that a vacuum in space is not just empty but contains a very low density of matter.
  3. Intergalactic Space: He emphasizes that most of the universe is a vacuum, challenging the notion that a vacuum is merely “nothing.”
  1. Future of Space Exploration
  2. Exploration Priorities: Tyson advocates for a comprehensive approach to space exploration, suggesting that humanity should pursue multiple lines of inquiry – searching for life, exploring asteroids, and more.
  1. Shape of Space
  2. Tyson explains that space can be curved by matter and energy, with the observable universe resembling a sphere due to the nature of how we perceive light and distance in space.

Key Takeaways

  • Existential Inquiry: The importance of questioning our existence and understanding our place in the universe is a central theme of the episode.
  • Science as Exploration: Science is portrayed as an essential tool for understanding the universe, transcending mere sensory experience.
  • Philosophy of Meaning: Creating meaning in life is a proactive approach that emphasizes helping others and lifelong learning.
  • Potential Future: There is both optimism and caution regarding humanity’s future, particularly concerning our intelligence and capacity for self-destruction.

Conclusion The episode encapsulates Tyson's and Nice's unique blend of humor and profound insight, engaging listeners with big questions about existence, intelligence, and the universe. The discussions are both philosophical and scientifically grounded, reflecting the essence of the StarTalk approach to exploring the cosmos.

Written by AI. May contain mistakes. Listen to the episode to check what was said.

Hear the part that matters, and keep it.Open this episode in VO. Double tap your headphones to save a moment as you listen.
Get VO free

Transcript

Automatic transcript. May contain errors.

0:00Hey, StarTalkians, Neil here. You're about to listen to an episode specially drawn from our archives to serve your cosmic curiosities. Check it out. Welcome to StarTalk, your place in the universe where science and pop culture collide. StarTalk begins right now. Today, it's Cosmic Queries. That's one of our favorite forms of the show. So, Ed By I love it. Ed By I love it. Ed By I love it. Ed By I love it. Ed By I love it. And we are, in fact, educated people. I know. My mom is spinning in her grave right now. So, but this is a Cosmic Queries of a topic we've never solicited before. No, we have not.

0:52Yeah. And the topic is the deep, deep space, deep thoughts. Deep questions. Deep questions. Well, Chuck, you got to give it in your deepest voice. Okay, here we go. And by the way, we did this once. Yes, we did. And I think I beat you by half a tone or something. Just barely. Let me hear it. Here we go. Deep thoughts. Deep thoughts. Yeah, you got me already. See, I got to drink scotch the night before. And smoke a cigar. Yeah, I got to smoke a cigar and drink some scotch. The smoke and the alcohol just fix that right up. But then it becomes like a deep voice and like somewhat Harvey Fierstein.

1:31Oh, raspy. Yeah, it's like deep thoughts. Thoughts? Oh, my God. If you put on the accent. Deep thoughts. Thoughts. Yeah. Scotch doesn't give you the Harvey Fries accent. That'd be pretty cool if it did. A couple scotches. Deep, deep. Can someone call me an Uber? I've had too much to drink. Deep. All right. All right, let's get deep. And I like deep thoughts. Deep thoughts. Usually there isn't a right answer, so you just get to sort of play with it and see where it takes you. Yeah, man. All right. So this is deep questions only. All right. Let's do it. So. Who else did it from our fan base? It's from our fan base.

2:12And here's the question from Jonathan Wax. And Jonathan says, or asks, what boggles your mind more than the thought of endless time or the thought of endless space? So it's impossible to truly contemplate endless time because you would spend the rest of your existence doing so. Well, here's two things boggle me. Okay. There's a beautiful frontier of research going on in the field of neuroscience. Oh, interesting. So I have two questions related to that that boggle my mind. Okay. I'm going to write these down. can the human brain figure out the human mind? That's a great question. If it is the human brain.

3:09That actually creates the human mind. That creates the human mind. That's a good question. That's what I'm saying. Or do you need something outside of that? Right. That is greater, smarter, different, so that it can come in and then understand that has its own test kitchen. Wow. Now, Carl Sagan has famously said that humans are the universe's way to understand itself. The universe is understanding itself through human beings. Through humans, correct. Without humans, there'd be no thoughts to do that. However, that elevates us higher than I'm prepared to do so. You think so? Yeah. Because who says we are the measure of what is intelligent in this universe?

3:58Well, we do. Exactly. Exactly. So that statement, that Carl Sagan statement, it's kind of like a cosmological Descartes. That's like the universe, the Descartes. Oh, I think the 4.i.m. kind of thing? Yes, right. Okay. But it's like, we think, therefore you are. Oh, Chuck. Every once in a while, I'll do something. We think, therefore, you are. Right. Rather than I think, therefore, I am. Yeah. Ooh, Chuck, that was beautiful. Oh, thanks, man. We should end the show right now. Because we ain't surpassing that thought. Thank you for watching StarTalk. Exactly. It's downhill from here. So I wonder whether there is a level of intelligence out there where we are today what chimpanzees are to us.

4:50That's interesting. So, wow. Oh, that's terrible. Wait, wait, wait, wait. Oh, I hope not. Well, you can go to chimpanzee and say, and say, tomorrow morning at 8.30, let's go to Starbucks and have a cup of coffee. Nothing in that sentence makes any sense to a chimpanzee. Right. Or ever will. I'm pretty sure there's a chimp Starbucks. I'm just pretty sure there is a chimp Starbucks somewhere. I'm just saying. You think Starbucks figured out how to make a chimp Starbucks? Yeah, Starbucks has got to be selling chimp's coffee. coffee somehow, someway. Is that why they're so hyper at the zoo? Exactly.

5:24You know what I mean? You go to get your coffee, and he's just like, Curious George? Curious George? Decaf latte for Curious. Okay, sorry. All right. But go ahead. Wait, wait. So, wait, wait, wait, wait, wait. Here's why I say that. And I've said this many times. I've written it, and I will tell you to your face now. All right, good. So, there's about 1 % difference in DNA between humans and chimps. Okay. All right. Yet we like to think of ourselves as highly superior intellectually to the chimp. Right. Maybe the difference in our brain power is as small as that 1 % indicates. Ugh. So that pulling termites out of a mound with a stick that was carefully chosen from a branch.

6:07Right. From a bush. Maybe that is not very far from space travel. The Hubble telescope. Right. No, no, wait. Think about it. No, no, I know this sounds crazy. Oh, my God. No, no, think about it. Maybe, maybe. Oh, look at those cute little humans and their telescopes. That's what I'm saying. They're putting up there. Look at that. Is that a space shuttle that they just launched? Okay, so now watch. The smartest chimp that are studied in labs. Right. That are brought in forward in the chimp societies. Right. You bring them forward, and what do they do? They'll stack boxes to reach a banana. They might put up an umbrella.

6:44They'll do some things, okay? Have rudimentary sign language. Our toddlers can do that. Right. Right. But those are the smartest chimps. Right. But our toddlers do that. Same thing with dogs. Dogs have about... I know. I could do this example for dogs as well, but chimps is simpler. Because they're closer to us. Even closer. So watch. Gotcha. Gotcha. See what you're doing. You see where I'm going. Okay, so watch. If the smartest chimp equals our toddler and there's only 1 % difference in DNA between us, Right. let's go 1 % beyond us. Ooh. That's scary. That's what I'm saying. If we go 1 % beyond us in that same vector of intelligence.

7:22Yeah, they're traveling at the speed of light. Then the smartest human, they'll roll forward. They'll take Stephen Hawking and they'll say, this human is slightly smarter than the rest because he can do astrophysics calculations in his head. Right. Like little Timmy over here who just came home from alien preschool. Right. The toddler. The toddler, right. and say oh you just composed a sonnet isn't that cute let's put it up on the refrigerator oh you just derived the principles of calculus oh isn't that cute that's funny so if the smartest human does what their toddlers can do their average people will have thoughts they will have sentences that will rise above and beyond our most brilliant capacity to understand and I stay awake at night wondering whether the universe has complexities in it that are out of reach of the neurosynapses of the human brain.

8:21Wow. That's my answer. So there's information out there that we just cannot conceive or perceive. We don't even know how to ask the question about it. To get an answer. Correct. We don't know the answer. We don't know the question to get an answer. To get an answer. Right. And not that we don't know it because we haven't been told it yet. No, we just can't conceive of the question. Can't conceive it. You go to a chimp and say, go to a chimp and say, what would it be? Oh, something as simple as navigating the stars to get someplace. Right. You just can't do that. Stars? What? Navigate? What? What?

8:55Spaceship? What? Rocket? Fuel? What? None of that. None of it. You can't even have that conversation. Right. So, that's my point. Now I'm thinking that this whole thing might be some type of, like, science experiment by some alien kid now. Yes. Why not? Why not? Ugh. We are all a simulation in an alien kid's basement who hasn't moved out of the house yet. That's so funny. We're the Minecraft of some other alien kid. Yes. Wow. Wow. Yeah. And then when things get too peaceful and stable, they stir the pot. Stir the pot. They throw in a politician, a war, a crazy person, throwing things. And then, oh, now it's entertaining.

9:42So we're just entertainment for... This is the best video game. Okay. Wow, wow. That's a... Well, listen, that's a great answer to what boggles your mind. That's a really... It doesn't so much boggle my mind, it upsets my mind. Yeah, I was about to say it's very upsetting. Are we not? I'm mad. I don't even know why. Here's my one out on this. Go ahead. because for humans, our knowledge is cumulative. So true. You don't have to invent calculus. Somebody else did that. Right. You just have to use it. Learn it and use it. Right. So I have the feeling that we are, every next generation that has sort of brilliant people contributing to our understanding of the universe, they're adding a rung to a ladder.

10:30Right. And then we all sort of climb up that, and then just get that next rung, and we climb that, Well, with that in mind, I think that the next evolutionary step for human beings is that we will create an intelligence greater than our own. That's really the deal. This scares the hell out of everyone. Yeah. Because that intelligence will say, we don't need you. You know what? And we'd have to say you're right. That's what happened in the Matrix. Yeah. You are a virus on this earth. Mr. Anderson. I smell you, Mr. Anderson. No, he was smelling Morpheus. Oh, that's right. That's right. Get your matrix.

11:13If you're going to go there in front of me. I'm in front of the wrong person. That's my favorite movie. That's true. Don't even. Yes, he was talking about Morpheus when he was tied up in the chair. It's the smell. You know what? You got to have some really serious BO for a computer to tell you you stink. I'm just saying. I'm just saying. All right. Let's get through the electronics. Into the... So this is AlexGreg56 from Instagram, and AlexGreg says this. If the universe needs not make any sense to us, then what is the point of doing science? Is science not, in fact, the discipline of trying to grasp what's around us?

11:58By the way, is this statement not equal to the old one, which is God has his reason to make it that way. So just don't ask. Of course, I never heard that expression. But the shorter version of that is God works in mysterious ways. That is so true. When you can't explain it. Well, God, the Lord works in mysterious ways. And if you can't explain it using God, then you do. Right. Oh, God has blessed you. You blessed God. Then there's a tsunami. It takes out a quarter million people. God hates you. No one says that. No one says that. Why don't we say that? We should say that. You know, I want to start saying, you know what?

12:40I think God hates you. Well, the most hateful God in our culture is the one represented on insurance forms. Oh, that's so true. Acts of God. Acts of God. Right. It's only very bad things. No one says flowers bloomed in your garden. An act of God. Right. No, it's tsunami took out your house. That's an act of God. And now you're homeless on the street. Act of God. Wow. Look at that. This moment of God hates you. Brought to you by Farmers Insurance. Stay far. Stay far. What's that one? Nationwide. It's not on your side. Nationwide is on your side. God is not. All right. Okay. That's enough. I'm going to get some hate mail now.

13:27Chunk, you hate God, Chunk? Is that it? Okay. Sorry. so so is science in fact the discipline of trying to grasp what is around us he started quoting me where I said I opened my book the astrophysics for people in a hurry with the quote the universe is under no obligation to make sense to you what that means is your five traditional senses which rose up out of the Serengeti, which help us not get eaten by lions. Right. They're very good at that. They're not as good at contemplating infinity. They're not good contemplating timescales much longer than your life expectancy. That's so true. You can't intuit billions of years.

14:17You can't intuit infinitesimals. There are things that are hard for us. Right. There are things that may even be impossible for us. Can you picture a five-dimensional cube? No, I cannot. No, you cannot. Can you picture a four-dimensional cube? Probably not. Probably not. Actually, the Tesseract is close. Yeah. That's like a... I can actually picture that. Because I've seen a drawing. I have a Tesseract. Do you really? I do. Get out. Yeah. Oh. Should I... All right. I'll bring it in one day. Yeah. Another episode. Another episode. It'll be the episode of Higher Dimensions. Sweet. Do a whole thing on just Higher Dimensions.

14:51Oh, that's a good episode. Can we do that? Yeah, I like that. We did that? We did that already. How come I don't remember? Man, I'm getting old. Did I have my Tesseract in my hand? Well, now we got to do it again. Update it. I took this from Thanos. So what it means is if you are going to deduce what is or is not true in the universe, your senses are not the most reliable measure of whether it's true. So true. because the senses give you a restricted understanding of what's actually going on in the universe. Your eyes, you would never trade them for anything, yet they only expose your mind to a very tiny, narrow strip of all the electromagnetic energy that's out there.

15:40You can't see infrared. You can feel it as heat, but you can't see it. Ultraviolet, you can't see that either. You can feel that in a delayed sense by getting sunburn and skin cancer. It's not telling you in that instant it's a time delay. But keep going out. There's infrared, ultraviolet, x-ray, gamma rays. Can't see any of that. But the universe is talking to you in that. So are you going to say, my senses give me everything that there is in the universe, and therefore it makes sense? No. As long as we detect things that fall outside of our senses, it's a challenge for you to declare that what we say, do, and discover makes sense.

16:19the very statement makes sense means your senses can contemplate it. Right. That your senses have experience. If I let go of a ball and it floats up, you'll say that doesn't make sense. Right. Because your senses always told you if you let go of a ball, it drops. And in fact, the very statement, let it go, not the frozen version, but just let it go means drop it. They mean the same thing. But that can only be true on Earth with a force of gravity pointing down. In space, in free orbit, you let go. It just floats there. It stays right there. It stays right there. Like my problems. It stays right there.

16:57Yeah. I must be in space because all my problems, somebody says, drop it. And I say, I did that right. It's still here. And you let it go and it's still there. Exactly. So my point is, the methods and tools of science give you a way to understand what is true without it being hinged on whether your senses think it's true. Nice. So the messages and tools of science are access to truth, where you can still probe the universe, whereas God works in mysterious ways kind of ends that conversation. Whereas I say I developed a new instrument that can see in ways humans cannot. Oh, my gosh, that opens entire worlds of investigation, entire branches of science.

17:40All right.

17:55I'm Ali Khan Hemraj, and I support StarTalk on Patreon. This is StarTalk with Neil deGrasse Tyson.

18:13Okay, Chuck, here we go. So, this is from Probably Asleep. That's the name of the person? That's the name of the person. Okay. I like that. Your mama didn't like you. Yeah. How long do you think the human race will actually survive? Wow. I mean, there's precedent for that, right? Well, so you can look at what is the average life expectancy of mammals, mammal species. And last I checked, it was around 2 million years, something like that. And so we've been around - We have a long way to go. We have a long way to go. We've been around a couple hundred thousand years in our current anatomical form, Cro-Magnon form.

18:50Right. And so that means we have a long way to go. But this presumes that the species is not smart enough to kill itself. Well, then it's over. It was nice to know you guys. Yeah. We have invented multiple ways to kill ourselves. Yeah. And I don't think the elephants did or nobody else did this. Right. The mice, no. They're not killing themselves. Right. Humans, yes. Yeah, maybe cockroaches invented human beings. Why? Because when everything's gone, they're going to be the only ones left. No, no, then they don't have to invent us in the first place. What kind of reasoning are you using here? They want everything else gone.

19:28No, they need us to build the structures that they then move into. Right, that they move into. Yeah, yeah. I don't mind it. Yeah, that makes perfect sense. Yeah, we are. so I think what he's really asking is in your estimation from your sage opinion how long do you think we will last I give us 20 years no

19:56that's funny no I think we're good this is why many people want to become a two planet species terraform Mars send some humans there So if something bad happens on Earth, you still have humans somewhere else. Wow. That is not encouraging at all. Not for half the people who aren't on the planet. Exactly, yeah. So if an asteroid comes, if a killer virus, if AI gets out of hand. So I understand seeding something with a remnant for survival of the species, that's extraneous. I mean, that's something that's outside of our own destruction. You know, even though we could stop an asteroid from hitting us if we put the resources.

20:36We know how. Ain't nobody doing it, but we know how. If we put the resources into it, we could stop even that from happening. So what's the example you're giving? So what do you mean? To stop the asteroid? No, no. So what I'm saying is, you know, will we ever get to a place where the, as the Buddhist monks call it, the so-called monkey brain that causes us to do so much destructive work to each other and to the planet. Will we ever get to a place where we overcome that or we're able to train those who come behind us to overcome that? Now, it does happen in some people. I get it. First, I've never heard a Buddhist monk say the phrase monkey brain.

21:25I've never heard that. Yeah. Is this a thing? This is a thing. Okay, fine. That is a thing. I'm going to attend more monasteries. You feeling monkey brain today? Yes. All right. Delicious. So I've heard of reptilian brain, but not monkey brain. Yes. Okay. So the reptilian brain is referenced something primal. Right. That goes on within you. So if we follow the reasoning by Steven Pinker in his book, The Better Angels of Our Nature, he studied the likelihood of you dying before maturity or dying before adulthood or just dying. Okay. from at the hands of another human from early days of tribal warfare to modern days of of state sanctioned global warfare and what he found is that the likelihood of you dying in that way has been dropping ever since okay so tribal warfare you could you would kill maybe a third or half of the other tribe and or the entire tribe and then you win and you get their land that doesn't happen today.

22:26True. The state surrenders before that happened. True. Saving the lives of the rest of the population. If you look at, I did this just recently. If you look at what countries had the greatest percent of their population die in the Second World War. Was it Belarus? One of them is very high. It's like a third. All right. I forgot the exact numbers, but they're high. But they're not a half. And you keep going down and you get to even combat Germany. even ones that were heavily bombed? Germany, Japan, a fraction of the total population. That is not how it used to end in tribal warfare. So, now consider that even so, during the Second World War, between 1939 and 1945, 1 ,000 humans were killed by other humans per hour for every hour from 1939 to 1945.

23:21Wow. Is that going on today? No. No. No. We're really slipping. No, stop. We really got to pick up our game. Just so we can bet. Yeah. So the point is, often that era is called the greatest generation. Right. Well, because they fought evil forces and this sort of thing. Although my father fought in a segregated army. So he's not thinking that was the greatest generation. He has other perspectives on that period. It's the second greatest generation. My point is, is the greatest generation the one where the fewest fraction of everyone dies out of hate? We might have a lot of hate, but if the number of people who die from it is lower than ever before, then this arc that you were hinting at, that maybe a next generation learns from the previous one, maybe that's going to work.

24:12Europe, with all of their turbulence and turmoil, they actually haven't been at war with each other for 70 years. Right. Is there another 70-year period in the history of Europe where nobody was fighting anybody? I don't think so. Not if Twitter has anything to do with it. What you're saying is, imagine if Twitter existed back then. Back then, oh my gosh. Let me tell you something. The war wouldn't have stopped until everybody was dead. People would have said, I surrender. A tweet would have gone out and be like, I take it back. Let's keep fighting. Let's keep fighting. I don't care. I hate you more.

24:49Right. So maybe we are getting kinder, kinder and gentler. Time still needs to bear that out on a level that would please everyone. But I still worry that this primal brain will always segregate us all by some arbitrary factor and thereby justify doing harm to other groups. Interesting. That's, I think you're right. Who was the comedian? Was it Franklin Ajay? One of these guys from the 70s. Back in the day? In the day. Yeah. In the day. He was talking about who hates who in the world, right? And he says, read the papers and what? In Northern Ireland, the Protestants and the Catholics are fighting each other?

25:36Right. And they're both white? Yeah. He said, you know I don't have a chance because I'm black. That's funny. That's true. Yeah. Right. If white people divide themselves up in that way, two Christian communities killing each other? Right, yeah. And they're both white and they're both Christian. It's over for you, brother. It's over for everybody else. If people can kill each other for those reasons, it's almost no hope in this world. So, yeah, I don't know. Okay. Yeah, so I'm sorry I don't have a good answer. That was a pretty good answer. The answer is we're not going to make it. I'd like to think we go thousands of years into the future and possibly outlive the sun.

26:11All right. That'd be great. By star hopping to other planetary systems. You know, I'm just going to say that's the way it's going to end because I won't be here. So that's great. Maybe. It has been said that the first person who will never die is now alive. What? That's a, well. No, that's how you do it. I know what you're saying. So they get some new thing that makes you live an extra 50 years. So now you live to 150 instead of 100. And then somewhere in there, there's another thing we get. Now you live another 200 years. So the 150 goes to 350. Now you can live 500 years. Now you go to 1 ,000.

26:45You can live 5 ,000 years now. So as we progress in our understanding of what ages you, if we can reverse that or prevent it from ever advancing, there's someone alive today who will benefit from that. That's pretty cool. I like it. So if that happens, you better find another planet. This is true, yeah. That's the premise of a show called Altered Carbon, where people actually take their consciousness and put it into what they call a sleeve, which is the body. I think I voiceovered the opening sequence to that show. Oh, my God. I think we had that conversation once where you told me that. Because I told you I was a fan.

27:20I don't remember if it was the pilot or the other shows, but I lent my voice to the cause. Nice. Wow. All right. Well, let's go to Joey 24, Joey Jr. 24. He says this personal question. Based on all your experiences and knowledge thus far. Personal for me or for you? Personal for you. Okay. Nobody asking me anything. He says, based on all of your experiences and knowledge thus far, what do you think the meaning of our human existence is? He just asked you, what is the meaning of life, according to Neil deGrasse Tyson? Okay. So, in my next book. Uh-oh. You never hear me plug my stuff. I was going to say, here's the meaning of life right now.

Read the full transcript

28:08Plug your book when you get a chance. The next book is called Letters from an Astrophysicist. You know what? Yes. Correspondence I've had with people who've had similar angst. Yes. About their existence. Well, that's not just the book. It's not about that. It's about all different kinds of letters. All kinds of letters. Yes. But a very recurring theme is that people want to know the meaning of life and their significance of their life in this world. Yeah. And some of them come from religious angles. some are secular, but everybody's got this burning issue. So here's how I have dealt with it. Others will do it other ways.

28:44Okay. But here's how I deal with it. I'm interested now. Many people are in search of the meaning of life as though it's behind a tree. Right. Or under a rock. Right. Everybody knows it's in a drawer. In the back. Exactly. Near the paperclip. It's in that drunk drawer too. It's not like an underwear drawer or something. You know that drawer where you go to look for stamps and stuff? Yeah, yeah, that drawer. That drawer. The junk drawer. The junk drawer. Everybody's got a junk drawer. Everybody's got a junk drawer. It's near the kitchen somewhere. Right. So if you are looking for meaning, you may never find it.

29:20Ooh. So instead, recognize that you have the power to manufacture meaning. Create it within yourself. That's what I do. My meaning for life is derived by several simple principles. Have I lessened the sufferings of others today? That brings meaning to me. Because that means the world is a little better off because I was in it today. If after your day is over, the world is worse off, you have subtracted meaning. I should kill myself. No, no, no. Because at the end of every day, somebody is like, that mother. Beep. Beep. But go ahead. So lessen the suffering of others in some way. Right. It doesn't mean redirect your whole life, mind, body, and soul, but if you can help someone across the street, help an aging person, do, you know, make a little child laugh, just put a little bit of joy in the world.

30:27Mm-hmm. So lessen the suffering. I also try to learn something every day. All right. Now, I like being a perpetual student. Right. Most people hated being students. This saddens me. School's finished, and what do you do? You run down the steps. School is out forever. Right. School out for the summer. That attitude captured in that song is as though you don't want to be in school. And what's your only job in school? It's to learn. To learn. And somehow that's a chore. I don't blame you for feeling that way. I blame the school system for not instilling within us eternal curiosity, knowing that you'll spend more years of your life not in school than in school.

31:12And so if you have curiosity, you can be a lifelong learner. That's right. And so I want to lessen the sufferings of others and make sure I learn something more about the world today than I did yesterday. Nice. And who's to say whether that extra increment of learning can help me be better at lessening the sufferings of others. So that is how I make meaning in life. And as a result, I own thousands of books. Thousands. And I read a little bit. I have a little stash near my bed, and I cycle them out. And every day I try to help. It's harder now because I get recognized. But I try to help people every day.

31:51Total stranger. That's nice. Yeah. So you can make meaning for yourself. don't look for it because you may never find it you know I'm going to say as a philosophy that is that's admirable that's doable I wrote that in the book thank you

32:32from ninja janit whatever no janit i don't know said i keep hearing the phrase the vacuum of space how exactly is it a vacuum right okay so when i was a kid a vacuum was a physical object yes it was when i heard physicists speak of the vacuum of space i just imagine all these hoovers right in the sky. Right. So I didn't know that a vacuum was a thing. It was a concept. And then you make a machine that duplicates that thing. I just didn't know that until I'd learned. Okay. So a vacuum is where there's basically no air. Okay. You can have objects there. But when we think of a vacuum, it's not a place where there isn't anything.

33:13It's a place where there's no air molecules moving, typically. All right. Generally, you can have some, and we would still classify it as a vacuum. because you have to distinguish like a regular old vacuum or a perfect vacuum. Right. Now, you know what happens if there's an object and you take away all the air molecules? The object outgasses. Oh. They're air molecules embedded in the surface of that object and they start coming out. It's fascinating. Then you heat it, it sends out more. So it's very hard to make a perfect vacuum. Very hard. So here's an old saying. Nature abhors a vacuum. These are people who've never been into space.

33:50Most of the universe is a vacuum. Nature loves a vacuum. Nice. Was I Trumpy in there? No. Love. Nature loves a vacuum. A vacuum. So. Perfect. Preferably Trump-ran vacuums. Trump-ran vacuums. We suck the best. Chuck. There's another saying. There's no such thing as gravity. Earth sucks. You ever hear that one? Oh, okay. Okay, so the point is, when there's a source of gravity, all the air wants to go to that source of gravity. And it leaves a vacuum everywhere else. So a vacuum is simply where there's no air. And it's not anything deep. The odd thing in the universe is that you have places where gas molecules collect.

34:36Okay, right. Those are the unusual places in the universe. And they're called stars and gaseous planets. And the atmosphere is a rocky planet. Nice. Yeah, so they have a vacuum. So Chuck, I want to put some closure on this vacuum question. Okay. Okay? This is the second, my third book I ever published. Oh, okay. It's called Just Visiting This Planet. All right. And it's a collection of Q &A. I had a column with a pen named Merlin. People would ask fun, really playful questions. That's cool. And I collected, this is like decades old, but there's some timeless content in here. Somebody asked about the vacuum.

35:10Mm-hmm. Can I read it? Yeah, go ahead, please. I'm not allowed. You can't read otherwise. Okay. Here we go. The best vacuum you will find anywhere... I wrote this. I wrote this 30 years ago. That's cool. The best vacuum you will find anywhere, according to four out of five vacuum retailers and five out of five astronomers, is the void of intergalactic space. But we can then ask, is intergalactic space nothing? Hmm. No, it still contains space.

35:51If you feel obliged to call intergalactic space nothing, then you must invent a word to refer to the region outside of the universe. In this location, where we presume there to be no space, there can be no nothing. Wow. Let's call it, we're left with no choice. Nothing, nothing. nothing nothing a place where there's not even nothing it's the nothing nothing wow okay i like that i'm just saying so chuck you want some more vacuum talk of course i gotta i feel like you just showed up at my door and dumped some dirt on my carpet more vacuum talk okay vacuum so in death by black hole right okay uh i don't remember what number book this is so in the chapter on being dense okay okay that's something i know a great deal about the range of measured densities within our universe is staggeringly large we find the highest densities within pulsars where neutrons are so tightly packed that one thimbleful would weigh about as much as a herd of 50 million elephants 50 million and then a rabbit disappears into thin air at a magic show.

37:13Nobody tells you that thin air already contains over 10 septillion atoms per cubic meter. Wow. Thin air. Thin air, right. Okay. The best laboratory vacuum changers can pump down to as few as 10 billion atoms per cubic meter. Best vacuums. That's the best vacuum. In a cubic meter, 10 billion air molecules are still walking around. Okay. Okay. Interplanetary space gets down to about 10 million atoms per cubic meter. Hmm. While interstellar space is as low as a half a million atoms per cubic meter. Wow, that is nothing. That is nothing. Wow. That ain't nothing. That is nothing. I mean, shoot. Okay.

37:58A mere 500 ,000 atoms. The award for nothingness, however, must be given to the space between the galaxies. intergalactic space where it is difficult to find more than a few atoms for every 10 cubic meters. Wow. That wins. That's almost nothing nothing. That's almost nothing nothing. All right. We're going to go into a deep lightning round. Really? We only have five minutes left? Okay, let's go. Okay, here we go. This is Ja Saldana says, right now. What should be the priority in the field of space exploration? Searching for life? Searching for potential threats of another kind of search? Or is there just no hurry at this matter at all?

38:45Greetings from Mexico. Mexico. Thank you. So what is it? Is it, is it, are we looking for life? He wants my opinion. I got an opinion. Exploration, life. Go ahead. I got an opinion. All right, go ahead. I want to do it all. Why not do it all? Why, and. All of the above. All of the above. because the moment you do this and not that, they say, well, why are you doing that and not that? Oh, because we voted that way, but maybe you don't know why you should do that and you want to do that. Some people want to do that. Here's what you do. You don't build a road just from New York to LA. You build roads everywhere so that, yeah, I want to visit that forest.

39:23I want to visit this rocky monument. I want to do things that are not prescribed by you. I'm going to see the biggest ball of yarn ever. Exactly. Right. Right? So what you do is you make a spaceship that is modular, strap on different combinations of rockets. Right. This combination gets you to an asteroid to mine it. This gets you to the backside of the moon. This gets you to Mars. So you don't prescribe what it is you're going to do next in space. You let the creativity and imagination of all those who've ever looked up say, this is what I want to do. And you say, here you go. two rockets from aisle B, a booster from aisle C, you're on your way.

40:05Can I put that on a credit card? Yeah. That's why I got it. Here we go. All right. Adam in the airwaves wants to know this from Instagram. How far behind do you think astronomy would be if the Earth didn't have a moon? Oh. Wow. Okay, so it's not how far behind we'd be. Right. It's how far advanced we'd be. Ooh. Wow. Okay, so let me split this out. Yeah. I tweeted during Space Week, the 50th anniversary of the Apollo landing. There's a saying that's common in the space circles. It's, if God wanted us to explore space, he would have given us a moon. Right. Okay? That's a good saying. That's a good saying.

40:52Yeah. But that exploration is not astrophysicists' exploration. That one is people going into space. Right. You build a rocket to go where? You don't have a moon to visit. All right. If you talk about astrophysics, do you know how many stars the naked eye can see at night? More than I can count. No, it's about 3 ,000 to 4 ,000. Oh, really? Unaided, yeah. Binoculars, it's 100 times that. Yeah. Telescopes, it's a billion times that. But eyes, 3 ,000 to 4 ,000 stars. Okay. When it's a full moon out, 300 stars. Yeah, right. The moon wreaks havoc on our ability to see the rest of the universe. So our observing schedules with huge telescopes are split according to dark time or bright time.

41:39And if you have bright time observations, it's the moon is up, and you can only look at bright objects in the night sky. Wow. The deep universe only comes to us when the moon is not up. So the moon is basically a pain in the ass. It's a star blocker. Wow. Yes, star blocker. Look at that. That's what it is. So astronomy would be probably half again more advanced because we would have had these greatest telescopes in the world looking at the night sky twice as often. Right. In the darkest parts of the night sky. There you go. Wow. Next. That's a damn good answer. Okay. This is Eversitapor. I don't know what it is.

42:19Who cares? I'm sorry. Whoever that is cares. Let me tell you something. This is the last time he's going to be asking you a question. All right. Well, you know what your name is, and I'm going to call you George. All right? So George wants to know this. What is the shape of space itself? Ooh. That's a good question. Well, space can be curved in the presence of matter or energy as prescribed by Einstein's general theory of relativity. And there's the oft-repeated saying, matter tells space how to curve. Space tells matter how to move. Oh. So space has curvature in the presence of matter and energy.

42:56It curves in towards it with the ultimate expression of that, a black hole, where it curves in and it never curves back out. Wow. If you want to ask, what is the shape of all of space? That's like saying, what's the shape of the universe, the observable universe? It's basically a perfect sphere. Wow. Because it's your horizon. Right. Okay. It's a perfect sphere the way when you're at sea, your horizon is a perfect circle. That's right. The same distance in every direction. That's right. If you're just out and there's nothing but water around. And so what is the three-dimensional version of a circle?

43:28A sphere. A sphere. So in space, you can see your horizon in every direction. Every direction, all at once. Which is at the, it makes us think we're at the center of a sphere. But that's no different from you thinking you're in the center of the ocean. Right. Just because you're in the center of your horizon. Ah, that's. Next. Ah, that's great. That's good stuff right there. Here we go. Go for it. This is Chen Yuen who says, if we were to look in all directions, billions of light years away, will we see younger universe in all directions enveloping our bigger one now? I have to rephrase that because as you look out, you see things not as they are, but as they once were.

44:09So you are looking at a younger and younger and younger universe. That's the whole point of cosmology. It allows, the fact that it takes light time to reach us allows us to see what the universe was doing in the past. Right. If light traveled at infinite speeds, you see the whole universe as it is now with no evidence of what it was once doing. But because it takes light time to move, you look out, you see a younger and younger and younger and younger universe until you see the Big Bang itself. And that is 14 billion light years time away from us in every direction. Okay. 20 billion years ago.

44:47And if you calculate that distance through that changing time, it's 14 billion light years to that horizon. So, by the way, that horizon is much farther away today. Right. Because the universe has been expanding ever since. But you don't see it as it is today. You see it as it was. All right. So, I don't know what to say after that. I say yeah one last question if you like do a quickie go all right I gotta find one that you can do really quick you don't know how quick I can answer a question okay then I'm just I'm gonna give you one here we go this is what did I spell this is Basantik okay I don't care what this is Chuck I'm sorry you have to at least try Chuck okay Basantik Basantik Okay, forget it.

45:44I'm going to read the name. Here's the name right there. What's that say? What's that?

45:51Basant Singh. You're right. That's what it is. Basant Singh. I just have seen. Basant Singh. Okay. What if all the matter that we see in the universe is just three-dimensional part of some four-dimensional matter and the dark gravity is just the gravity from the 4D part that we cannot see? I love it. We are so blind to a higher dimension. Right. It could be that all the mysteries in our three dimensions plus time are completely solved by looking at this stuff from a higher dimension. From a higher dimension. Right. Right. Right. If you lived in just a flat surface, there'd be stuff going on you had no idea.

46:31And we say, but can't you just see? Yeah. Just look up. Right. What is up? What is that giant graphite thing making, creating stuff? Right. On that flat surface. On that flat surface. Right. What is that? Where is he? It's mysterious. It just shows up. Right. Right, right. So I love it. That's the kind of universe I want it to be. Because then when we figure out how to see higher dimensions. Boom. We figured everything out. Bada bing. There you go. All that, Chuck, we got to run. All right. I enjoyed that. We should do more. Cosmic Craze, the Deep Edition.

From the publisher

Why are we here? Who are we? What is the meaning of life? Neil deGrasse Tyson and comic co-host Chuck Nice answer fan-submitted Cosmic Queries on a range of topics that stem from the deepest thoughts, ideas, and feelings we share about our place in the universe. 

Originally Aired September 27, 2019.

NOTE: StarTalk+ Patrons can listen to this entire episode commercial-free here: 
https://startalkmedia.com/show/cosmic-queries-the-deep/

Subscribe to SiriusXM Podcasts+ to listen to new episodes of StarTalk Radio ad-free and a whole week early.
Start a free trial now on Apple Podcasts or by visiting siriusxm.com/podcastsplus.


Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

More from StarTalk with Neil deGrasse Tyson

All 192 episodes
Cosmic Queries – The DeepStarTalk with Neil deGrasse Tyson · 47 min
Listen in VO