Sean Carroll: Is There Intelligent Life Out There in the Universe? | AI Podcast Clips
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- čas přidán 8. 09. 2019
- This is a clip from a conversation with Sean Carroll on the Artificial Intelligence podcast. You can watch the full conversation here: bit.ly/315QhfC If you enjoy these, consider subscribing, sharing, and commenting below.
Full episode: bit.ly/315QhfC
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Podcast website: lexfridman.com/ai
Sean Carroll is a theoretical physicist at Caltech, specializing in quantum mechanics, gravity, and cosmology. He is the author of several popular books: one on the arrow of time called From Eternity to Here, one on the Higgs boson called The Particle at the End of the Universe, and one on science and philosophy called The Big Picture: On the Origins of Life, Meaning, and the Universe Itself. He has an upcoming book on Quantum Mechanics that you can preorder now called Something Deeply Hidden. He writes one of my favorite blogs on his website preposterousuniverse.com. I recommend clicking on the Greatest Hits link that lists accessible, interesting posts on the arrow of time, dark matter, dark energy, the Big Bang, general relativity, string theory, quantum mechanics, and meta questions about the philosophy of science, God, Ethics, Politics, Academia, and much much more. Finally, and perhaps most famously, he is the host of a podcast called Mindscape that you should subscribe to and support on Patreon.
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Watch the full episode with Sean Carroll here: bit.ly/315QhfC If you enjoy it, consider subscribing, sharing, and commenting.
Search about Annunaki Lexi🤒
Sumerian are also aliens
Navdeep Sidana oooooooooooooooooooiuuii
Lex I have proof there is life here way more advance i have a video of a ship taking off for me clear view at night i live on a mountain over looking a valley and a mountain across from me I kinda asked it too show me and I have proof
I think there are billions and there has been plenty of observations of them. How many military pilots, commercial pilots, government officials, etc., who have reported seeing and detecting advanced crafts do you need?
Certainly the vast majority of UFO claims are not authentic, but all claims? I don’t think so.
I dunno about intelligent life but my name is also Sean Carroll so that's pretty cool.
My last name is Carroll too
We stan
I know that's fucking awesome bud! Pretty sure about ETs too tho so take my opinion with a grain of salt 🤭
Coincidence? I think not.
What an arrogant thing to say, “if there are billions of civilizations we would have discovered them by now”. There could be 1 civilization per galaxy , there’s billions of galaxies. How would we’ve discovered them by now?
Lost a bit of respect for him the way he said that
Not Billions of galaxies, there are at least 2 TRILLION galaxies, so trying to find a million life forms within 2 trillion galaxies is like the proverbial needle in the haystack
@@michaelpierce2018 well in observable universe is the keyword. there may be infinite number of galaxies for all we know...but we will never be able to see them.
Our practical universe is our Galaxy anything outside the Galaxy might as well be in another dimension it is out of our reality.
It's a very ignorant thing to say and I can answer him. A. There's plenty of things that have been suppressed to the public. B. How would we have discovered ? We're really just getting started in space exploration. The universe goes on forever. Big place!
As smart as people can be, we are so damn arrogant.
I'm so tired of seeing people say this. I get it, it's romantic to squash scientific thought, but it's just not useful to assume that intelligent life must exist. In truth, we have no idea which is why Carroll wasn't saying he knows one way or another. However, given the data we've accumulated as well as cold, hard logic, it's *improbable* that intelligent life, in the way we define it, exists in the observable universe. If we're going to explore the universe and even search for signs of life, we need to have this mindset; one where we consider the data and analyze it using math and science. We can't live life like it's a blockbuster sci-fi movie.
@@Edude117 and you just completely justify my point. To have an opinion on what's possible in the observable universe is beyond arrogance.
Lmao You yourself have an opinion on the matter, though. Otherwise, you wouldn't have your panties in such a bunch. You believe it's possible that aliens may exist. Therefore, this PhD researcher who's way smarter than you is hurting your ego by contradicting your opinion. Don't act all enlightened. It's perfectly normal to have opinions on things, we all do. It's when we let our opinions dictate our actions that it becomes a problem.
@@Edude117 again you justify my point with your "know it all attitude" you sound like a crybaby. Who needs science when trolls like you know everything already. No need for different opinions because trolls like you know everything. We've barely explored our own solar system but troll here knows the universe already.
@@axemanrob7161 Nice strawman. I never said I knew anything. In fact, I've stated both explicitly and implicitly that no one knows anything. And for the record, I disagree with Carroll. However, unlike you, I'm not dismissing the opinions of a PhD physicist because he knows a helluva lot more about the matter at hand than I do. If anyone's acting like a know-it-all, it's you. You're calling someone with vastly more qualifications than you arrogant because he offended your sensibilities. I'm the one laughing, though, because I know your brash attitude would be squashed if you ever met Carroll in real life, or any scientist for that matter. Typical keyboard warrior...
Well...it isn’t zero
Exactly, so there must be billions, or, Drumroll............... we don't exist
I wish lex had said that
it can be. we dont have any data to conclude anything.
I wouldn't consider us to be intelligent life, so maybe it is 0.
@@Twigge125 after reading ur comment i might agree
Ive learned so much from Sean over the years,and really and admire his openness to different view points. It’s a rare quality not only in scientists,but people in general.
It much more common to have the air of perceived arrogance. In fact, it’s much more presumptuous.
I’ve yet to see any intelligent life here on earth.
While you type this off your phone or laptop which was made by intelligent people 😂😂 your not one of them we know that
Londer G says the person with a basketball player for their profile picture. 😂 Thanks for stopping by champ.
Decimal Exercise yes because being interested in a sport makes you dumb 😂😂 Thanks for proving you really are as thick as nails 🤣🤣
Decimal Exercise God bless your offspring champ don’t be dropping none of them on their head now 👏
I like that time-scale notion, that's something I often consider myself.
I like it when people say the same things I think. It makes them look like a genius.
What if we are extremely rare? Like about 1 civilization per 1000 galaxies or so? There would still be a billion civilizations but we'd effectively be very alone.
If there is just one civilization in the observable universe like he suggests, that would be the weirdest thing to me.
@@RichardCookerly Exactly, it is just mathematically extremelly unlikely
@@gaeb-hd4lf actually is not, it depends off the odds for life..
Life was microbial on earth for 3 billion years and only by a fluke chance 2 cells merged together, chances of that happening are very small, that small that is almost impossible..
And then when you take other odds into eqation, for instances how small are the odds to life even start as microbial, that odds might be 1 in trillion.. And then you have dozens of others, just as unlikely odds for life to reach intelligent life.. And if you do a math, you will see that odds are pretty low that theres another intelligent civilization out there..
If we didnt get hit by asteroid just perfect size to kill dinosaurus but not rest of life form, we wouldn't be here, what odds of that happening are? Prob 1 in trillion or something..
I think you get the point.
Odds for life to become intelligent is smaller then all "habitable" planets in observeble universe, it might be just us on all those planets..
@@tr1x243 those "1 in trillion" order of magnitude probabilites are completely speculative. The appearance and survival of intelligent life clearly is an unlikely event, but we dont know how inlikely and my guess is order of magnitud smaller than the number of habitable planets in the whole universe
@@gaeb-hd4lf it is speculative, but the fact that to this day, with all tehnology and sience we still dont know how life started, and we cant produce it in a lab, show us that life to start is very complex with many criteria and perfect conditions needed..
Also lets say that life started as microbial on billion planets (which i doubt) , the odds that they reach intelligent is very small, might be just 1 in billion, or only us..
Also what is intelligent's? What if intelligent life is just as rare as life to even start? Currently on earth is 8.7 million life forms (and thru history that number is much much larger) and i see only us typing on a phone or flying in space. And what that shows me? That intelligent life is very very rare, maybe even a fluke..
I think there is life somewhere in universe, but i think we are the only intelligent specie in whole universe..
Even one per galaxy. We can’t escape our own star system let alone get to another galaxy
To say that we are the only intelligent species in the universe is like saying "there is no fish in the ocean"
there is 1 fish in the sea,thats it.
end of story.
NO it isn't xD
if you go fishing in the ocean
and dont catch any fish year
after year.you begin to beleave
theres no fish in the sea.
The ocean doesn’t exist
no other fish in the ocean you mean.
Definitely need to get Sean back for another podcast, the last was much too short.
Yes, Sean's an excellent physicist but I'm not sure this is the place for him. He needs an audience with a higher standard of intellect.
Highly recommend "Why we might be alone" lecture by David Kipping!
Just based on the sheer number of galaxies and suns and planets and... and... and... the probability of (some form of) life "out there" is astronomically high. And no matter how long we search for other intelligent life, we will never know if we are alone in the universe because we will never get to explore every last corner of it. And when you think about it, either result is amazing. If we are alone... Wow, and if we're not alone... Wow.
There’s actually an equation for predicting the probability of life in the universe. The problem is without knowing the likelihood of abiogenesis it’s incomplete. Depending on that value the universe could be teeming with life or it could be virtually empty. I’m no expert so I’d recommend Cool Worlds vid on the subject. I’m sure I’ve gotten something wrong in this brief explanation haha
@@yajy4501 -- You're talking about the Drake equation. It is all based on guesstimates, which is of course, all we have to work with. I'm just saying that the numbers are so astronomically high no matter which way you slice it, so high that the probability of life "out there" including intelligent life, is a certainty, and by that I mean 99.999999999999999999999999% a sure thing. Whether or not we're being visited I don't know. I sometimes wonder if they're already here or perhaps from another dimension. All possibilities. But I'm not expecting any great discoveries or aliens landing on the lawn of the White House in my lifetime.
I volunteer to upload into a robot and explore the universe
I've thought about this except as a pure observer that doesn't interact with the laws of physics, so I can travel instantaneously and easily navigate a black hole.
@@Wtiberon thatd be an awesome afterlife
I agree with this idea!
Zero or billions.. this fella needs some AI
😂😂
He is not wrong. Drake's equation is our best mathematical way of inferring if any civilizations exist. If you plug in 0 for the variable of a probability of alien civilization existing, the equation will turn out to 0. If you put in that even 1 civilization exists then the equation will add to a very large number. All it says is that there is a possibility of one, due to the vastness of the universe then there is a chance if a billion.
@@vchemka2 How are you defining "best" in that statement?
@@lachlanbell8390 Best as most effective
@@vchemka2 Drakes equation is the best we have for now but it's so very primitive lol, capturing the complexity of the rise of intelligent life much less civilizations is still a bit far for us
When I worked at AutoZone all of the customers came in and blamed us. Sometimes that was the truth but much more often it was their inability to understand how things worked.
I believe that almost all things are that way. If things don't make sense...it's because we haven't figured out how to make sense out of it.
Your point well made! These days people are falling for all sorts of idiocy perpetrated by charlatans!
Universe? Yes, of course. There are literally TRILLIONS of galaxies. In our galaxy? Maybe not; we might be the only civilization. Intergalactic travel makes interstellar travel look like a cakewalk, so even if there are trillions of other highly advanced space-faring civilizations in other galaxies, it's ENTIRELY POSSIBLE that they might never achieve intergalactic travel.
My exact thoughts
@@wasdwasdedsf Intergalactic travel requires our current understanding of the laws of physics to be incorrect. Galaxies are moving away from each other faster than the speed of light. We must literally go faster than light to reach other galaxies.
intergalactic not you are right but just in our sector in milky way wich is several thousand solar systems 12% to 15% is populated
czcams.com/video/vHfTYHagmOQ/video.html
ALLIESOFHUMANITY.ORG
@@JorgeM270 only the very far ones
You underestimate the scale of our galaxy. It takes 28000 light years to reach center of the galaxy from Earth. It’s got 200 billion stars and is 100000 light years in diameter. Each light years is 6 Trillion miles. It’s very likely that our galaxy is beaming with life.
I like to believe there are any type of life in space that you could think of. Like life forms that breathe blood and they bleed air
1:37 you whyts started that 👀😂😂
How often does someone get to say smelting in conversation 😂
If you work in a foundry, probably several times a day! e.g. smelting iron, smelting any metal etc.
This podcast clip stuff is great, it's like post-it notes in a textbook for easy reference
"If there were other inteligent civiliasations out there we should have noticed something so far"
It is an argument some people like to make but I don't see how it would prove the point? We have barely just begun "looking" and saying something like this while at the same time knowing that there are countless things out there we do not yet understand about universe? Come on!
What he meant is if intelligent civilizations are common in the universe we would have seen signs of one of them by now.
@@user-hh2is9kg9j The US government just said those UFO videos are for real
@@user-hh2is9kg9j But why should we expect that to be the case? Again, we haven't been listening long (or perhaps even in the right way). For example, they wouldn't have heard from us either, because we don't have a good way to announce ourselves. Seems reasonable that they might not either, hence why we haven't heard from them.
@@mikew5th No, they said that they were unidentified. It doesn't mean they are aliens.
@@___jd Just to be clear, we are talking about intelligent alien civilizations and not simply "aliens" because I expected simple life to be much much more common than intelligent life so if there are algae aliens on Alpha Centauri it will be very hard to detect them and of course they will not detect us. Now back to intelligent life, if it was the case that intelligent life is common and giving the age of the galaxy there are maybe tens of thousands of intelligent life that are thousands and even millions of years ahead of us in technology. This means that they or their robots will have spread among the starts and we would have seen their footprints somewhere by radio signals and so on. take us, for example, we have been broadcasting -unintentionally- for a century which means that any intelligent alien with a sphere of 200 light-years diameter will be able to detect us if they use advanced enough technology. And they will be watching episodes of Family Guy. In other words, if we were 100 light-years away from earth we could detect the intelligent life on earth using our current technology. So maybe the case is that intelligent life is very very rare.
2 trillion galaxies in the observable universe... Seems pretty unlikely, in a universe where there are planets all over the place, that some of them didn't go through a similar process as the earth under similar-enough conditions to evolve intelligent life. Even if it were only 1 planet out of every 100 galaxies...
And when James webb finally goes up we'll end up seeing even further out. Definitely hard to think out of all those stars there's none similar enough to us. Plus who's to say that life couldn't form under different conditions under different stars or environments.
He is absolutely right
No he isn't. The fact simply is he has absolutely 0 evidence as to whether intelligent life exists in abundance in our Galaxy and others.
I mean how old the universe supposedly is... we've only been in the modern technical age for 100 years ... we've maybe missed it or something has been by yet
we're so small in comparison to what's out there
I'm reading Sean Carroll books, one of my favorite writers these days.
I believe we definitely are not alone, and again the Universe is massive
I think there alot of life in the ocean we haven't even discovered yet.
Just like the Sentinelese, there might be an undiscovered tribe that steadily developed technology throughout history to be 3,000 years ahead of us. If that is just on earth where more than 3 unconnected societies develop technology at different levels the universe must be teeming with intelligent life. This gentleman's arrogant position comes from the mind of someone who is privileged. I will love to see his face once the true nature of UAP's is revealed.
@@eblgraphics me too
I concur
Totally disagree. There is surely intelligent life elsewhere in the universe.
It seems incomprehensible that were alone in the universe.
It's egotistical to think we are.
Hallelujah ! Thank you for a very interesting video of an interview with Sean Carroll. It was very logical and had an appeal to practical sensibilities. The topic of Ets is very difficult to analyze and discuss without being somewhat ackward. Imagine if one could go to a different Time and tried to discuss cell phones with an intellectual in a 10 century college in france. They would be without any mental scales of reference. Similarily trying to talk about beings that are probably a million years more advanced than our smartest Scientists would be chaotic at best. In Short, Imagine a classless society that is utopian with absolutely no crime, war, poverty or any corruption and that would be a society of beings about 30,000-100,000 years more advanced. What would a society be like that's a million or more years more advanced ? Voila ! Advice--Don't Worry-Be happy ! May all beings be happy, healthy and wealthy ! Amen!
You think the right way, I applaud you. But I know from experience that alien fans don't want to believe truth, longer explanatory posts on YT get ignored, not read, or insulted.
We kinda have noticed them throughout history, Sean.
Sorry my friend, you're dreaming.
Read the book Rare Earth, by Peter Ward.
Great conversation. Really does make me feel we are in a simulation. Or multiple dimensions we can’t level up to see yet
Forget ''multiple dimensions'', they don't exist. We know of only four, the rest is conjecture.
Don't put faith in multiple dimensions, there's only 4 we know of. The other 7 are only conjectures from string theory, not proven.
Once you understand not that there are so many stars that have habitable planets around them (Kepler found an enormous amount and it only looked at one area) and even close by (they just found a rocky body around the Brown dwarf of Alpha Centauri, but seeing that the Brown dwarf is a flare star and the rocky body being so close to the habitable zone, life would find it hard to take hold - but there are two other stars just behind it that are binary and are very similar in age and composition to our own sun - and we dont know if anything is around them - yet - havnt even looked! there are a great amount of stars close by (in galactic terms) some older, some younger but the majority having planetary bodies around them, as you understand how life came to be here on earth (and the amount of mass extinctions, with life bounding back) the possibility of life being on on other planets in so many different forms - depending on the star it orbits, the amount of radiation from that star, the gravity and make up of the planetary body will dictate the type of life on that planet - and as much of it being stranger than any science fiction movie could imagine, some would be more than aware of us being here, and once they got far enough in their evolution to split the atom, get passed using that as a weapon on each other - I think life is peppered through the galaxy - at varying stages of evolution, even close to us and humans being contained here on earth not being able to get off isnt a problem for other species - I think the problem for them is what we may be capable of once we get off the planet and into deep space - and with current technology going at the rate it is,,,I give it 100 years or so and with our current history - a worry to say the least - www.space.com/18964-the-nearest-stars-to-earth-infographic.html Humans are only Just figuring out where we are in the milky way and what exactly is out there - with the new technology going up, we are going to see more tan we realize and to think we are the only ones here amongst all that is truly deluding themselves - Are Aliens looking back waiting for us to get to a stage to get out into deep space and visit other star systems? - I dont know, but the answers may be here sooner than we think.
Or we're living in the matrix and no one bothered to program another civilization.
This is the easier answer for my brain
stop
Nico Bruin p
FINALLY..someone stating logical reality. Nobody likes to hear "we're prob alone" but for now.. yes.
You're right! But that's because most don't understand the enormous difficulties involved. The fact that we or anything else, can NEVER exceed light speed, is just one example. There are many more problems! I've explained it all at length but alien fans don't want to hear facts.
We've noticed.
A sprinkling of Alan Alda here.
Watch the Docu “Unacknowledged” it blows your Mind if you intelligent
Postulating 0 on the basis of nil signals. Granted. However, finding one (especially close by) leads to your billion hypothesis. That’s what happens when you spend (and I’ll be generous here) only 2 percent of your economies budget looking for signals from space. There are not enough privately funded companies to take on this endeavor.
Science fiction has largely polluted our ideas.Some things are brilliant, predictions by A.C. Clark, Heinlein, or Huxley.Most are absurd.This is the most intelligent observation I have heard in a long time.Kudos!
We haven't discovered them yet simply because the distances are so vast between the intelligent civilizations in the universe we may never be able to span those distances with communication devices to discover them - ever. But they are out there.
You're on the right track, but we can't say for sure what if anything intelligent is out here.
He has good reasoning, about the artifacts. It's exactly what we would do.
About the fact that there is either 0 or a billion intelligent species out there... there very well could have been billions, but as the natural progression and expansion of the universe went on for billions of years. Just maybe there was a sweet spot where life WAS teeming across the universe, and that we are the last of that time of growth. One of the last to spring up, and it wouldn't be so weird to think there could be - Us, a newer intelligent species, and a couple others who are on their last leg...
Carl Sagan was asked, if there are intelligent aliens way in advance of us, why haven't they made themselves known to us??? His answer..."precisely because they are more intelligent ,they haven't made themselves known to us" paraphrase..lol 🤣🤣🤣#🤣🤣😂😂
Imagine being imprisoned in a high security prison. You know there are other prisoners in the same facility,you just can't talk to them.
There may be billions of type 2 intelligent civilizations, maybe even type 3, but FTL being impossible means we are not likely to ever meet any. Even if there’s only 1 in half the galaxies, that’s a shitload. But that is far more likely than any of them finding us, let alone leaving their own galactic bubbles.
I'm sure you're basically correct there. We will never meet aliens, if they exist, they are simply too far away. Many people just don't want to accept physics facts, it spoils their dreams.
@@geoden I'm sorry but your comment is absolutely correct on
spacetime 👍🏼folks only experience thousands maybe millions of miles of travel in a life time and that's in sections at a time on earth but nobody can fathom a light year let alone hundreds let alone thousands of light years.... boom the brain cannot comprehend it no matter how hard we try... just can't.
The mistake here is that people think they're smart, "we would have noticed already". There could be something watching earth right now and we're to stupid to see it. Moreover we're still learning about our own sun and don't even know what causes gravity yet.
Not all of us are stupid, but the ones who think Sean Carroll is wrong really ARE stupid! Sean addresses the host who he assumes will know what he means, as I did. Sean is not concerned with silly ''alienists''.
Finally someone agrees with me when it comes to alien life.
yes, we are the minority.
@@user-hh2is9kg9j The majority is always wrong..
@@beautygrey5635 good chances. But "always" as a statement is cocky
@@grumpswain1847 there are no rules without exceptions. Including this one.
Yes we are special! However if there is infinite number of universes is true there are other universes timing with life..
What about higher dimensions? He has only considered possibilities within our 4 dimensional perception.
The better question is:
Is there intelligent life in Earth?
That's debateable!
Great original question
I didn't really get his argument about parking objects in random solar systems being a better approach than transmitting and receiving radio signals... Can someone help me?
MKBlackbird sure. Sean Carroll is notorious for making reductionist, ridiculous, and/or often purposely over-simplified arguments on subjects that don’t interest him.
It makes sense. As an advanced civilisation explores the universe, it'll surly leave marks of it's existence around the universe. This will be a statical way to store a memory, and very little energy and resources are required to implement that memory. An advanced civilisation will most likely not send signals randomly everywhere, as it understands that there will be an even more advanced civilisation out there that may eliminate them.
The argument was you would constantly have to do it, for millions of years because life on planet A would evolve intelligent life at a different time as Planet B. Civ A has the technology to transmit radio waves but on Planet B there is still single celled organisms at this point. If you were an intelligent species it might be a better option resource wise to park some type of message of communication device on a planet you think would/could develop life. Beaming Radio Waves take a long time to get somewhere and need to be constant
There probably are billions of other life forms out there. We just haven't been able to communicate with them because of, you know, spatial problems :-)
@Hersh Shorsh Yes, space is REALLY big :-)
Time is the counter to space, with this argument. The galaxy could be 10 times as big as it is now, and there's still been plenty of time for just one civilization to spread to every corner. If life was common in our galaxy, probability tells us we would see evidence of that. Which means we have to assume it's rare.
@@WaxPaper You make a sane reply without any reply comments apart from mine, it just goes to show the scientific knowledge of YT commenters is very low. Comments made are either wrong, silly, insulting or just plain ignorant. There is no desire to learn.
Why? just cause there are a lot of planets? Space is a dull dead place. The likelihood of any other intelligent species co-existing with us within the observable universe is very low.
@@Paul-ic2ki No matter how advanced life is elsewhere, it still has to deal with the tyranny of distance. They are unlikely to be able to break the laws of physics. Not long ago people thought there were no other planets outside our solar system simply because we hadn't found them. This seems completely stupid now, but that is what many people are like. Now we know there are trillions of other planets and extremely likely there are trillions of other earth-like planets, not to mention other planets which could support other forms of life. It seems obvious that life elsewhere is almost a certainty. It's not as if we're living in some extremely unique part of the Universe or galaxy. The laws are the same everywhere. If it's happened here, it's happened elsewhere.
This is new.
Bob lazar said alien craft in Area 51 was discovered in archaeological dig. Sean’s theory at 4:25.... maybe they’re both correct? I’ll put down the J now.
Yeah right
Are you really owning up to believing Bob Lazar?
Norman Bergrun
Joe invite Jacques Vallée to your podcast
There’s no “Joe” here. This is Lex.
“There could be artifices in our solar system that have been put there by an advanced civilisation”. Have a guess which planet those artefacts are on.
Sean point about why would a super intelligent life transmit radio signals into outer space. For the same reason we do to try to find other life-forms.
To Sean's point that "we would have heard from them" I wonder where that assumption comes from. Would they have heard from us? No, because we haven't been broadcasting for long enough, nor are we capable of targeted contact. So why assume other civilizations within our local region have this ability?
That assumes these other beings are existing at the same time as us. If an alien civilization is older then us, and more advanced, why haven't we heard from them? If they are younger, then it begs the question of why have they evolved now and not before?
What makes shows like Star Trek, Babylon 5, and others so odd is how even most races are. We should be over run with signals, crafts, or beings if intelligent life was so prevalent so this great silence leads to the Sean's point us being alone in the universe. Maybe intelligence kills itself off before establishing off-world territories or intelligence is just such a rare occurrence that maybe we really are the first or only in this galaxy or even universe.
If you know some physical law, you will know where that assumption comes from!
@Panagiotis S. Radio travels AT light speed, not faster, not slower. But for space communication, even light speed is too slow. Alpha Centauri, the nearest star system to us, requires 8 years to communicate with it. 4 years there, 4 years back! Not very promising, is it?
@Panagiotis S. Thankyou! You are in a appreciated minority. Mostly, alien fans ignore or react negatively to science facts.
Think of what the host said and think why Sean said what he did, the answer is there!
Really like how Sean Carroll express his point of view in a very serious, and not tendensious way, he is the best man to really get a serious answer. Anyway i hate his many worlds interpreration support.
You are right about Sean giving serious answers. However, I don't understand your hatred of his quantum ''many worlds'' approach. Why do you hate it?
Sean is a smart guy; a stellar or interstellar civilization would not spray out radio wave communications in all directions and waste energy, they would communicate directly and have that figured out many years prior to living in space.
They would live in space first, and on a planet second because they will have already defeated gravity by merely living amongst the stars.
What would be unique on the various planets they can visit whenever they want? The biology of the planet.
Being able to visit any planet they want, they would not need to take the resources, they can create or recombine matter with basic building blocks like carbon, water, oxygen.
They would not be subject to the need for a sleep cycle that we are bound to because of the planet and sun rotation, so having a completely different metabolism.
Sean looks like he's seen something in a data sheet and hasn't been able to sleep since...
Not a physics follower clearly, Sean is a very well and known and popular physicist, being real, he doesn't talk about nonsense.
@@SoundsSilver You, are the absurdity!
I close my eyes and it’s Alan Alda..
My heart tells me we aren't alone. I think Lex is on to something. Maybe Intelligence doesn't look like what we think it looks like. I mean as humans... of course we would think being closer in nature to ourselves would make an alien race "more" intelligent. Maybe we aren't correct in assuming that our version of highly intelligent is the same across time and space.
Technologically intelligent Aliens that we could detect would more than likely have to be land dwelling creatures with brains and appendages/fingers. You need fire to make technology. No land/air = no fire. You need a way to manipulate that fire to create technology. No fingers/arms = no technology. You need the prerequisite intelligence/processing power to do both of these things. No brain = no intelligence.
My understanding is that intelligent life is a civilisation that can ponder it's origins.
Intelligent life doesn't plunder rob and kill one another and destroy their habitat
Answer: probably
What about that black knight satellite? Anyone ever get inside that thing?
that's a bogus conspiracy theory you absolute shit for brains, you're an insult for this channel and clearly not the target audience
@@HyBlock - Oh, so it's crude, aggressive vulgarians such as yourself who are the target audience?
I'm starting to think that we've been watching way too much Star Wars 🌟!
I think some people actually believe ''Star Trek'' science fiction is real''
Space time, 30 000 years ago one of the stars exploded on the other side of the milky way galaxy and we had heard that and noticed radio signals of half second few days ago.
Example:electric energy has been existing and in 15th century but humans did not have knowledge about it. If intelligence life exists my hope is that they are enough intelligence to not show themselves to us.
Thanks God someone said it like it is. Thanks Mr. Carroll i do share the same opinion as you.
@Nyle Haywood listen very carefully first. They are talking about "another" Intelligent live.
Nyle Haywood Carroll is full of shit, he's just guessing like everyone else. And in his case, it's a bad assumption.
@@quantumhype9839 You said better brother... "he's just guessing LIKE EVERYONE ELSE" ... No comments.
@@quantumhype9839 Sometimes physicists make guesses, they have to, but they guess intelligently, UNLIKE YOU!
@@geoden you sound fifteen, and maybe even that's giving you too much credit. Either Earth is unique in its ability to spawn life or it's not. We don't even fully understand just how vast the universe really is, so to assume the Earth is unique is not only the less likely reality, it's also the more arrogant position.
Humans have a history of being arrogant in our assumptions on topics relating to our importance, rarely does the reality fit the narrative.
When math-brain comes back to bite you in the ass.
What I wish is that people like Sean Carrol would take a big mushroom trip, or smoke some DMT... Couple that insane empiricist-mind with a sudden burst of open-mindedness.... The thing is, people like Sean Carroll and Michio Kaku often refuse to even try these things because they're afraid it might take them in a backwards direction (i.e, it'll somehow fuck them up). But I say that - what actual science we have set aside - there's so much anecdotal evidence that DMT-based psychedelics are safe and profound that they really don't have any rational excuse beyond "I'm simpy afraid to try." .... DMT trips often lead one to having novel (new) thoughts... And what better type of person to experience this than top tier physicists?
You could say why haven’t we seen them. But we can barely see other stars and when we do we’re seeing them way way in the past. I don’t think our sensory tech is advanced enough to make that case.
Why would it be more weird for there to be about a dozen planets in the galaxy with intelligent life than just one planet? My guess is that going through industrial revolution and becoming a technological civilization that is capable to send out radio waves is another bottleneck that not many life forms accomplish. Even within our own species that feat was only accomplished on one continent, Europe and its colonies (including America).
There might be lots of intelligent life forms on other planets who have never discovered electricity and thus were never able to send out any radio wave signals.
He is assuming that we would or they would, by now given our known age of the universe, have the tech to have been discovered or discovered us. But the fact could be that even if the galaxy had 13 intelligent life forms with high technology they still might not be able, according to physics, to even reach us nor any signals they might be sending even intentionally. He is assuming that if they existed we should know about them right now and since we don't they probably don't exist.
The thought of one day discovering artifacts of other civilizations in space or on other planets is super exciting. Imagine we find some million of years old satellite wreck from an ancient alien civilization floating through space one day.
Read Ernst Mayr.
There’s definitely intelligent life in another dimension.
What other dimension? We know only four, others are made of tiny strings we can do nothing with. Checkout String Theory.
The black Knight craft for example and the story that Tesla told of connecting with a craft in our orbit. We don't know if these things are true or not. If a military was bent on keeping these things to themselves they have the means to do it.
Why zero or billions?
Infinite possibilities isn't no or 100%. Sean is a great thinker but all the great ones are stubborn
Total BS
If you ask the question: "what is the likelihood that there are X alien civilizations in our galaxy ?", you can answer this question with different probability distributions. One answer is a uniform distribution on linear scale, that will result in an almost certainty for the existence of at least one alien civilization. One other answer is a uniform distribution on a logarithmic scale, then you get Carroll's answer: zero or very many. It's a matter of perspective really.
An intelligent exoplanet was beaming signals to earth from the years 650,050 BC to 650,000 BC, but humans were not yet able to receive them. Unfortunately, they became extinct 15,000 years later.
He ends the conversation by saying that Sci-fi is the way to go, and agreeing with Elon Musk.
Elon Musk ''Mars'' idea is nuts! I hope he gets some sense before disaster strikes on lift off or sometime during their 1.5 year journey. I notice he's not going himself, so he's not totally crazy!
I disagree. Given the incomprehensible size of the universe there are certainly others out there. But I think it’s rare.
Maybe we don't know, maybe we have been
lied to, who knows what
to believe. Personally I
believe the Universe, the
Multiverse the Infinity of Space the unknown is full of life, we just don't have the means to find out, or do we???!!
The borg catalogued over 700 intelligent species
Ahh, are you aware Star Trek was fiction.😉
@@geoden but tv said so
"Zero or billions"
Yet here we are, so zero it cannot be.
Even if he is being cheeky with that answer, come on... the universe is so big and we are just supposed to easily find/detect each other? That's very definitely going to be a challenge.
Life may be rare as it takes just the right conditions for chemical reactions to take place. Intelligent life is very rare but not impossible.
We arose by chance survival through millennia and mass extinctions.
Intelligent life may require just the right mixture of heavy elements to be available for energy and technology to progress.
The Galaxy is huge and our radio signals have barely left the beach -- other life face the same reality.
If they're out there the speed of light has simply not given enough time for signal propagation.
Ahh, a touch of sanity there, good for you!
Maybe send out a 'cigar-shaped' drone craft to orbit the Sun and another point some place else while snapping a few pictures every once an orbit? 🔭🪐
Why only zero or billions? Why not thousands or millions? He doesn’t explain such a remarkable position that certainly requires explaining.
If life happens regularly on habitable planets, then it would be absolutely everywhere. Given that there are billions of earth-like planets and the fact that the universe is billions of years old, then surely one of those civilizations would have spread all over in an obvious way. Look at our progress in the last 2,000 years. Even if there were 1,000 civilizations in our galaxy, surely one would have colonized it by now.
We look in the universe and see 0 proof of alien life. This could mean that life is astronomically rare, effectively 0. The only reason it isn't zero is because it happened here.
I like how he says the reason there isn't other intelligent life in the observable universe is because "we haven't noticed them" but then in the next question states that animals such as dolphins can be considered intelligent. SO according to him, hypothetically speaking, if there were dolphin-like creatures on other planets far away, they don't exist because we can't observe them? Doesn't that contradict his original assertion?
He mentions a "bottleneck", but the bottleneck (or great filter) can literally occur at any given point in time on any given planet. Does he not believe it's possible that there are thousands, if not millions (or billions) of planets that have evolved to the point of dolphin-like creatures but never beyond that? Why is that such an impossibility?
@@romanmanner But his original point goes against this. Clearly he's contradicting himself within less than 5 minutes.
More stars in our universe than grains of sand on our planet. One in eight of those stars has the capacity to have a solar system with a earth-like planet in it. The likelihood of other life beyond ours is 100% likely. Man-kinds most ignorant notion is that we're all alone.
Mathematical models don't mean anything.Intelligent self reflecting life forms are as far as we know a one off.
Mathematical models don't mean anything.Intelligent self reflecting life forms are as far as we know a one off.
Earthlike...A new word that gives the illusion that we are in a Grand Central Station of Populated planets.
Earthlike...A new word that gives the illusion that we are in a Grand Central Station of Populated planets.
So you think you know more than a famous physicist do you? You are talking about our solar system, not all of them!
Consider the immense temporal gulfs in technology inside of our own species. If we presented a CD/DVD (to say nothing of the now primitive Blu-ray disk) to the smartest intellectuals of their day circa 1900/1910/1920/1930/1940/1950....maybe even 1960, that would be viewed as an alien artefact far beyond their imagination and comprehension, let alone anything they could sense is an avenue for viable technology. If you told them their own species would be making these in the 1990s, it breaks their paradigms of possibilities. So now that’s inside of our own species inside of a 40 year span. Other technological civilisations in other parts of the galaxy or universe, the could be talking in neutrinos for all we know, and it wouldn’t be in English or Japanese, so it’s so incredibly far from our abilities to contemplate that a monolithic is straightforward by comparison. It would be more like having a chat with those that built the monolith, in neutrino speak. Nothing to relate it to, or perceive it by.
Before you can find intelligent life in space, you must first find it on earth.
The truth is not that complicated.
I think the bigger question for our species is if there is intelligent life here on 🌎
Nice
nobody actually paying attention to the key words he was saying he said observable universe not the whole universe
Yeah exactly. I'm pretty sure this is the dumbest comment section I've ever seen. Sean Carroll literally believes in an infinite universe where everything that obeys the schrodinger equation exists....he believes in infinite alien life, just not within our observable universe.
I'd have to disagree on this one. I think life is pretty common in the universe, but I think intelligent life is much more rare. Maybe for every billion planets with microbial life or there might be one with life evolved far enough that we might say it's intelligent life, and then for that intelligent life to actually survive long enough to make their presence known in the universe is even smaller. There might not even be one in every galaxy. To think that there is only us or billions of others seems like two very extreme views.
Let me know when they find intelligent life on earth 🌍
There is intelligent life on Earth, but here on YT it is vastly outnumbered by those who don't want to be told scientific fact. These people want to stay as juveniles who desperately need their fantasies to keep them happy!
@@geoden So everyone who watches this for fun or food for thought is a juvenile, I'd rather be that juvenile than elitist portraying himself as an intellectual.
@@futureboi8517 I didn't say everyone is a juvenile, some may indeed be so! It is possible to be juvenile in the sense of being not well educated for example, especially technically. That is evidently the case with YT. You wrongly accuse me of elitism simply because I'm reasonably well versed in science! I could perhaps more correctly accuse you of jealousy because you clearly are not scientific! If you were, you would answered me in that way! Now, I think an apology from you is in order! You may then graduate to a ''Future Man''.
@@geoden First of all don't backtrack you said the juveniles outnumbered the intelligent life on CZcams. Also thats really pretentious of you to think that you are more educated than me, even if you were (which probably you aren't) I wouldn't be jealous of. Only a idiot is jealous of another mans wisdom, I was just disgusted by your elitism which continues in this comment. Don't look down on people just cause you're educated, not every uneducated man chases fantasies but I could be wrong right? What do I know about I'm Future Boi..... you can call me dad tho cuz I can educate you son.
I hope you live a very, very long time.
Lol. That's basically what Bob Lazar told us. He said the US has "artifacts" or spaceships found in archilogical digs...
And now the pentagon says that have something from another civilization as well
Pentagon never said that lol. Show proof
If there are zero others then have w have we sprung up it must have happened else where
We fail to define both life and intelligence.
It is conceivable that Just like the Sentinelese another uncontacted tribe might have developed steadily throughout history to be 3,000 years ahead of our current society. A tribe so advance that they have decided just like we did with the Sentinelese not to contact us directly fearing what they might do to us if we turn hostile towards them. If on earth alone more than 3 unconnected societies have unilaterally developed technology in multiple ways the universe must be teeming with intelligent life. This gentleman's arrogant position comes from the mind of someone who is privileged. I will love to see his face once the true nature of UAP's is revealed.