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Is It Irrational to Believe in Aliens?
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- เผยแพร่เมื่อ 17 ก.พ. 2015
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Aliens! Could humans really be alone in this expansive universe? And if we're not, how come we've never made contact with other intelligent life? Everyone's thought about it; especially members of the scientific community. Join Gabe as he presents some of the most popular theories that scientists use to rationalize their support or skepticism of the existence of aliens. We may never know the answer to this age old question, but a little scientific thinking never hurt anybody!
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What SUCKS big time is the fact that I almost certainly won't live long enough to find out, the main reason I want to live for hundreds or thousands of years is to see how advanced science gets and what we discover about the universe, I need some immortality drugs Asap
+95TurboSol Cryogenics
ImperialBiscuit Yes! If it could actually work.
Life is one. I am you as you are me. You will experience it but just in another life form
BigIsaacTV
I would love that to be true honestly, I have no idea how we can say we "Know" that will happen though.
+95TurboSol I feel exactly the same.
Maybe we're all just looking at this the wrong way. We all assume it has to do with space rather than time. Think about it this way. The universe is roughly 13.8 billion years old. Our planet roughly being 4.5 billion years old. This alone means the universe took roughly 9.3 billion years to form a fitting planet for life. But there wasn't always life on Earth. It's estimated that the Earth took around another half a billion to a billion and a half years to even form the very simplest of life on Earth. As for complex life ? Roughly 3 billion years after the Earth's formation. Altogether, this is already roughly 12.3 billion years into the universe, already just under 90% through the current lifespan of the universe and this is just how long it took to create complex, or in other words, multi-cellular life on Earth. What we currently would classify as animals didn't even form for another billion years more or less. To keep this into perspective, we are now just over 96% through the universe's history to date. It took that long to form animals, not intelligent life, animals on Earth. Another 494 million years however, for what we call are our ancestors to have been born. And then another 5.8 million years to evolve to what we consider the modern human. Intelligent life on Earth took over 13.8 billion years (earlier I rounded down because the current estimate for the universe's age is 13.82 billion years). We, as a race, are literally not even a percentage in the universe's lifespan and we expect there to be more intelligent life ? For all we know, we could be the first intelligent life to have formed. Or we could be racing against one or more intelligent life currently, they could be in our galaxy or outside our observable universe. We may have spawned in a renaissance of life, we may be the pioneers, we may be late to the party, all other life could have gone extinct for already for all we know. But it's harsh to deny the existence of others when we ourselves, or at least what we classify as the modern human, has only been around for the past 200,000 years.
+iwolfman37 You forget that our sun is not a first generation star. Our system was made after a significant amount of dust accumulated into a certain area from supernovas. This shouldn't take very long on the grand scheme of things, because hyper giants that do go supernova usually only last for a few hundred million years. Some solar systems with habitable planets could have formed much sooner, like a few billion years sooner. Though, I do agree that there is a chance that we might be one of the first emerging intelligent species in the Milky Way, because of the fact that without a Moon sized satellite, a Earth sized planet would need a lot more time to stabilize and form the primordial soup.
Christopher Lamb Well, I'm not debating against there being intelligent extraterrestrial life. I was simply adding time, rather than just space, as a variable as to why we haven't seen evidence of other intelligent life. You are correct about Earth not being the first planet to form and be able to provide life, but who's to say every planet able to provide life actually produces life ? But with the amount of stars in our galaxy alone, and the amount of galaxies in our observable universe alone, I think it's a bit simple minded to jump to the gun and say, "because we have seen no concrete evidence of intelligent life outside our planet thus far, there must be no intelligent life outside our planet". Especially when even if our sample size were as big as our entire galaxy, that sample size doesn't even equate to a percent of the entire universe, not even close. You may as well be waking up to one of those quiet mornings when your family has gone out without your knowing and your house is strangely empty and quiet and say something like, "because I have not seen anyone yet, I assume for whatever inexplicable reason, I am the last human on Earth", which mind you, I and many other individuals have actually done.
+iwolfman37 the other factor here could simply be distance. There could be intelligent life out there, but the fact that with it best technology now (unmanned), it would take at least 75,000 years for us to reach Alpha Proxima, the nearest star to our solar system.
Both of you have valid points, and I wouldn't venture to disagree with either of you, but distance seems to be a big factor to me.
what if aliens made us.I believe in God and science,but god as a large alien and science as science.anyways its said that God made us in his image,so what if aliens made us?
Robert Smith But that's the point everyone makes and is what lead to the making of this video. Everyone always argue's about space. I'm trying to add another factor into the arguments so we're not left with simple-minded beliefs upheld by little to no evidence like our poor sample size
I feel they're not taking into account the size of this Galaxy.. Even if lets say 1000 species survived to the point of spreading their technology via satellites throughout the galaxy, these objects are tiny.. and we're talking 4-10 light years between each star system.. with an unimaginable amount of empty space and so many directions it could go.. The odds something comes close to our planet is insanely low..
And even with radio waves, lets assume they use radio waves as a primary comms tool for 200 years before advancing to a new technology. Then lets say 1000 species used it, at different times throughout the 10,000,000,000 years the galaxy has been here..
Thats what, a 1/10,000,000 chance we'll hear it in our time here..
I don't know, there is just so much time, and so much space. People always forget how damn big it is.
The one that gets me is that we're always talking about life as we know it. Okay, but they're aliens. They don't necessarily need to breathe oxygen. Maybe they don't need water. Etc. That vastly improves the odds of life existing then. It just pisses me off when people say humans couldn't live there so nothing could
That's..basically what I meant. I was saying it upsets me when we say "this planet isn't fit for humans, so there's no chance of life there." What you're saying is a little different yes, but it's the same idea. Even if we were the only sentient species in the universe, there's no way we're that special in the grand scheme of things
Alex Roeszler
Alex Roeszler I disagree, I mean the word "Special" and its meaning only exist because we created it, but besides that - If we are the only life in this Universe.. we are the only special thing about it.
99% of the matter/energy in this universe is basic simplistic reactions/movements. Rock floats in 1 direction, hits another rock, etc.
But life, us, we represent what, 0.0000001% of the universe yet we're the most complex things about it.. Our brain alone is more complex than the 2 trillion galaxies out there..
We are a tiny tiny tiny lump of matter, that can choose to not allow that rock to hit us, we can choose to move out of the way..
To me, that makes life the most amazing thing about the ENTIRE universe..
Hell, like Carl Sagan said - We are the Universe discovering itself.. Paraphrased a bit there, but the message is right on point.
People downplay life so much as being insignificant, life is the only thing that has given this universe any "meaning".
Kargadan This was under the assumption we're the only life, and with our current knowledge about this universe bud.
We all know the probability of other life is high, we all know there is more to this Universe than our senses can detect, we all are very aware of this.
But again, based on what we know at this time, life is the most complex thing about this Universe.
The Fermi Paradox is pretty much bogus if you apply logic:
1. We've only been actively listening for alien radio signals for about 50 years, and passively listening for them for only about the past 100 years. Assuming an alien radio signal from 50-100 light years away happened to pass by us, it would be so unrecognizable from encountering 50 light years worth of material interference that we likely wouldn't even know what we were looking at.
I mean think about it; the signal would have to pass through 50 light years worth of stars, solar wind, space dust, nebulae, planets, moons, asteroid fields, etc. before it even reached us.
2. Even if a civilization were highly advanced, and decided to visit EVERY SINGLE star in the galaxy, there's still a large chance that no artifacts would be left behind for us to find, because the likelihood of a species sending a manned mission to every single star in the entire galaxy seems extremely unlikely to me. Even if they only sent 3 people per star, that's 600 billion people to send out.
They would more likely send probes because they take far less resources, impart no risk on the user, and probes won't say, "Screw that, I don't want to do that." Probes would be unlikely to leave behind artifacts--like a can of Space Pepsi or a half eaten bag of Cheetos.
3. Advanced civilizations probably have a higher regard for not polluting the entire galaxy with their garbage.
4. Our Solar System is vast and mostly unexplored. We can hardly detect near Earth asteroids, and the ones we do detect are due to the thermal radiation they give off. You expect us to spot what would presumably be a long decommissioned alien probe sitting quietly somewhere in our enormous Solar System that we've barely explored? How hilariously confident humans are.
5. Advanced civilizations may have no interest in communicating with us, as they see us as too primitive.
6. Advanced civilizations may no longer use primitive radio communications.
7. Any evidence that they potentially could have left behind--either here or on the Moon--would be actively suppressed by the government or misinterpreted by historians as ancient myths about gods that descended from the sky.
#4 is a huge factor. The notion that we haven't seen anything as evidence that there's nothing there is dubious.
We have only very recently discovered radio waves. The notion that an civilization is still using a firm of communication that we JUST discovered is born of necessity; we can only search for what we already know, yet must acknowledge that advanced alien life may have long since abandoned radio or other electromagnetic communication in favor of something even more esoteric. Maybe they flirted with radio before using gravity waves then moved onto something else that we haven't yet found.
But we're not just looking for signs of alien life; we're looking for alien life that's also using technology that we're familiar with in the faint hope that the last signals they sent using their now-obsolete electromagnetic method didn't radiate past us when dinosaurs still ruled the earth.
BagheerathePanther
Yes, but the chance of their signals reaching Earth are slim to none, and those that do could be so ruined with interference that we probably wouldn't be able to distinguish it.
I was just trying to illustrate why the Fermi Paradox is such a terribly stupid and arrogant argument. It's like asking why you've never seen any evidence of an airplane, while at the same time you've never left your bedroom, let alone your house.
We've explored less than 1% of our Solar System and seem to think that's sufficient to debunk extraterrestrial life.
Really good reasoning!
+dolebiscuit
1. Radio waves are not what we are expecting to see when we talk about the Fermi Paradox. The paradox isn't just about why isn't there alien life in the galaxy, it's why isn't this alien life RIGHT HERE already, not sending out distant radio waves. Though I agree that if radio waves was the only thing you look for there would be a LOT of radio signals we couldn't detect or recognize. Of course, we only need to detect 1 of them, so you would need your logic to apply to 100% of every radio signal sent out by every civilization in existence, without a single one coincidentally being detectable by us.
2. Again, your logic only works if you demand that EVERY SINGLE civilization follows that logic. Remember, estimates put the potential # of alien civilizations in the millions, just in our galaxy. We would only need a single one to break your logic and this point is also null and void. Also, sending out 600 billion people sounds like a lot, but it's over the course of 20 million years. And the Fermi Paradox assumes that you go to a star in a generation ship, colonize it, have a bunch of new people, and then that new star system is also sending out their own ships to new star systems. As the # of colonized systems increases, the rate at which you can send out ships increases exponentially. This objection isn't really a barrier.
3. And again, this needs to happen to every alien civilization without fail. All it takes is ONE civilization to be like ours and there is junk all over the galaxy, even if 99% of the rest of them don't do this.
4. If all there is is a single decommissioned probe in our solar system, then yes it could easily get overlooked. But the Fermi Paradox doesn't say that, it's about aliens being HERE, in our solar system, and being active in it. Again, perhaps most won't do that. But it only takes one that is willing and every star in our galaxy is colonized. And that doesn't mean having a single probe sitting out near Pluto, I mean Colonized. With a capital C.
5. Every single one?
6. Again, every single one?
7. You are getting into conspiracy theory territory here, and I flat out reject it. It also has no place in a scientific discussion, so I won't comment further on it.
So while each point might have some merit to it for some of the alien civilizations that could exist, the only way for any of them to explain the Fermi Paradox is for them all to be applied to every last civilization that exists in the galaxy, without one single exception. This is the problem with the Fermi Paradox, every attempt to explain it requires some extraordinarily unlikely circumstances. I'm not saying that it proves aliens don't exist, because that would also be extraordinarily unlikely. I'm saying that this is a Paradox no matter what your conclusion is.
David Stagg
You have perfectly illustrated the biggest flaw of the Fermi Paradox: Arrogance. "Why aren't aliens here in out solar system, talking to us and letting us know that they exist", as if humanity is the center of creation and any race would just be dying to have a chat with us.
We're literally the only species on our planet that pollutes and litters. These are species we share genetic framework with, and we're literally the only species that does it. How could you logically expect a species from another planet with a multitude of different genetic frameworks to be anywhere similar to us in behavior? Again, human arrogance and narcissism.
Also, I've never seen a conservative estimate based on the Drake equation or any other similar model that would put the number of hypothesized space faring civilizations in our galaxy in the millions--no where close to that in fact. The most popular estimate I've seen thrown around is in the thousands.
And if you want to get into the realm of discussing an alien civilization colonizing the galaxy: Do you realize how many resources it would take to send a generational ship to every star in the galaxy? They would have to build 200 billion massive spaceships. That's a lot of materials required, and for what gain? The risk vs reward doesn't add up there.
Plus, finding applicants willing to leave their home world and never return--dooming their children to a life spent in space with no guarantee for their future prosperity--would be difficult at best.
Evolution would dictate that regardless of the planet a species evolved on, ensuring the survival and prosperity of one's progeny would increase the likelihood of one's genes being passed on to future generations.
So for a species to evolve far enough to become an interstellar species, one would reasonably conclude that evolution had long since weeded out the genetics of individuals who basically didn't give a damn about the success of their children.
We could go on and on, but my point is simple: The Fermi Paradox is an arrogant and flawed ideology developed by a narcissist and championed by other cynical narcissists :)
Not believing in the possibility of extra terrestrials or intelligent life in the universe is nearly as irrational as god. Just look at yourself, what are you? an intelligent creature in the universe. The fact that we are here proves that intelligent life can arise.
Rhiza The only thing to argue is the fermi paradox. Why haven't we found any evidence? maybe the laws of physics doesn't give civilizations enough time to contact each other (vast distances). Maybe the time an intelligent species is active is very short. Maybe life is much rarer than we thought. Maybe there are E.T's but are hiding from us. Maybe these intelligent beings are so different from us its extremely hard to detect them. Anyone who doesn't believe in the possibility of E.T's are irrational or very ignorant.
Ironecly you believe in something you can't prove and labelling who don't believe in it as ignorant, and that can be exactly the argument used buy someone who believe in God and you can be labeled as ignorant too, or let say a super alien who created us
***** There's a difference. We are proof that intelligent life can arise in the universe, we have shown how micro-organisms can survive in extremely hostile environments and chemistry has shown us that life can be created. We use astronomy to predict which planets can support life and even have space craft investigating other planets like mars which was found to have solidified water (ice) with the possibility of liquid water underneath its surface. Furthermore scientists even speculate that there are complex lifeforms living under the surface of Jupiter's moon Europa.
Denying intelligent life on the universe is denying humanity itself. If we're here why cant there be others? with all the evidence we've gathered over the years. The issue is that people think mankind is special, they think we where put here by a magic man in the sky so they cannot bear to know the truth which is that we are biological lifeforms, a product of evolution and physics. We are fundamentally no different from any other lifeforms here on earth.
Now, tell me the evidence for god or any reason for a god. Tell me why the laws of physics we have discovered do not need a god. Tell me why there are so many different gods. Tell me why statistically atheistic countries and people have a higher standard of living than other countries? Tell me why on average atheistic people have a higher level of education.
I could rant about this all day, but fundamentally, all the evidence points to other E.T's existing. According to the drake equation It would be incredibly unlikely (statistically wise) for us to be alone in the universe. And god has 0 evidence supporting it. That is the difference between irrationality from believing in extraterrestrials and god.
you believe in super intelligence to exit, why wont be god then? he is super intelegent you contradicting your self, you said if you have lows of physics you don't need god, why do you assume the pre existence of lows of physics in first place? who made these lows?
***** Oh wow.... I am talking about reality here. Not some preschooler magic ghost stories. I refuse to discuss with a person as irrational as you. Grow up, stop looking to silly magic for comfort and bring your mind back to reality.
I think a problem with finding extraterrestrial life is basically the speed of light. Most of what we can detect in the night sky has arrived to us from countless light years and we're seeing into the past.
So there actually could be more out there than we can detect but we can't detect it in real time. We certainly can't communicate with them in real time. Civilizations may have arisen in a time frame that doesn't allow for them to even get a message out that we can receive. By the time they do and if\when it arrives we may actually be extinct!
This problem is compounded by even more distance.
I don't want to sound pessimistic with that but I think it's irrational to think that if Aliens are out there then we must have contact with them by now or else they don't exist when you consider the above.
I think aliens HAVE visited our planet, but their technology is so advanced, we can't even classify as technology. Or their intelligence is so superior, we can't classify as intelligence.
Think about it this way: Imagine an alien species that is almost infinitely smarter than us. Not hard to believe, given the circumstances, right? Now, I'd propose an analogy. ALIENS are to HUMANS as HUMANS are to WORMS. Do worms notice "human technology"? Probably not. Do worms think humans are intelligent? Worms hardly even think, much less consider human intelligence.
Also, if aliens have such technology and intelligence, they would also have discovered warping by now. Right now, scientists only have theoretical equations for wormholes. It's possible that aliens could already have wormholes.
Howard Sterling You just stole a Cosmos quote and claimed it was your own!
Howard Sterling the assumption that they're advanced is just as crazy as they exist. Do you think the tendency to lean towards this pov is a hangover from religious ideology? For the record I totally believe in the possibility that whole civilisations that have existed and disappeared eons before us.
Howard Sterling Even if that were true, you would still detect remnants of other alien civilizations as primitive as ours. Like two separate ant colonies fighting in a humans backyard.
arnold s That's assuming at least that radio waves travel at the same strength to infinity. Many people seem to believe this but it's not true. Otherwise there'd be no such thing as bad or no reception. Either way the distance problem still applies especially considering that.
Probably doesn't help that movies like Contact seem to want to perpetuate this.
Also, it's highly possible that even if we did receive radio signals that they might be too proprietary or alien for us to decipher. I mean, even here on earth not all our wireless gear is interoperable. They could even be using encryption that people here haven't thought of yet that makes their signal look to us like background noise... Who knows
I recently read a stat that scientists studying planet formation have estimated that the earth is probably in the first 1% of all habitable planets that are likely to form in the milky way. That despite the fact that the sun is not a first generation star is not the point. Bare in mind that it took generations for some of the more complex elements to form. So it may be that we are actually "the ancients!" or at least early bloomers.
Thank you, I was sad that this wasn't told in this (or future) videos. Interesting would be the size of the mily way and the time, light has to travel to reach us, that maybe somewhere are aliens out there, but they are too far away for us to detect them yet.
The absence of evidence is not the evidence of absence
Statistically, it is.
Google it.
The3biscuits - That depends, of course, on the scale at which the evidence is gathered.
Sorry for the late reply, but I agree with what shiny veggie said. We simply know and have explored too little of the universe to conclusively deny the existence of aliens. To borrow an analogy I saw here, it's like taking a bucket of water from the ocean and having spotted no life, concluding that no life exists in the ocean
+Rahul -- You realize that if a theist used that as a defense of the existence of God they would get flayed alive by the commenters, right? I'm not sure why alien supporters should be held to a different principle.
What if advanced civilizations have managed to transfer into other dimensions? Which is why our perception of space appears empty. Maybe all the advanced species are all heavily populating another dimensions. And whenever we figure out how to travel there ourselves, well bump into another spaceship and they'l say "damn, about time the humans showed up, took y'all long enough" :D
Bruce Crawford
Dark Matter?
That's not good if they can travel to the nether before us
Bruce Crawford Or maybe we can only communicate with them through higher dimensions. Dimensions that overcome space and time, which limit us in this three dimensional existence.
Bruce Crawford You're a bright kid Bruce, keep questioning and thinking out-of-the-box.
Bruce Crawford Or maybe species evolve expand and then die and even if they expand through the galaxy we need to colonize the galaxy ourselves and dig everywhere for fossils, if there are any left over from the passage of time, to find any trace of them.
For the communication signals, it takes energy to send those signals, so how much energy would the transmitter need to use for us to see at a relative distance and my next question would be how much more sensitive our receivers have to be in order to detect any signals from far enough so that the chance, for any civilizations within that range, to be high enough.
just because you cant see somthing...doesnt mean it isnt there!
Like dark matter
Jake Bilton-Warn
or black holes.
+Jennai Shirow Plus the Fermi paradox is ridicules. We can't even see onto planets that aren't in our solar system! How do we know there is no alien technology hidden on there?
+Jennai Shirow how about GOD ? ha?
+GM If you believe in him. I for one don't
I liked the Great Filter theory. I've had two thoughts on this subject. One originated from the book "Speaker of the Dead." They find a less intelligent (yet still sentient) civilization on one of these new planets. However, in order to observe how the civilization would naturally progress on its own, the humans severely limit this new species' exposure to advanced human technology. So what if there's a greater intelligence watching us, yet they leave no trace for us to find because they dont want to effect the advancement of our civilization. I mean just seeing an intergalactic spaceship would effect the future progression of technology on this planet.
My second thought is, what if the universe is still relatively young? what if we were one of the first types of life to evolve into intelligent beings? That there are other intelligent creatures in the universe, but they're just not any more advanced than us? Idk basic ideas i guess but they make sense to me.
The universe isn't young though. Its 10 billion years old. Space travel is almost impossible. We haven't found a habitable planet and if we did it'd be too far away to travel to.
Well thats your first problem, assuming that 10 billion years (actually closer to 13 billion) is a long time. it could prove to be a blink of an eye in the grand scheme of things
Zachary Hunt - True, but it took only a few hundred thousand years for humans to evolve. 10 billion years is more than enough time.
True, but yet again, life developed multiple times and was nearly wiped out multiple times. Even our Earth had a horribly violent and chaotic beginning. Just look at some of the Hubble footage. A lot of the Universe out there is still violent and chaotic. Of course most of those images occurred millions or even billions of years ago. Who knows whats running around out there at this exact point in time. And that's kind of my point. If we assume we aren't special, than we assume there's a 100,000 species scattered across the universe. WHY do we assume they're so scientifically advanced? Why cant they be a young species like us, on the come up in a recently established and stable universe?
Earth and humans can be early but it's all just very unlikely when you are dealing with large numbers. It's possible just as you winning the lottery 3x over tomorrow but unlikely.
what if...we're the first! -(ominous music)-
What if... we're the last (ominous music intensifies)
what if... we're not even here...
(Ominous music fades away)
Dude that gave me goosebumps as far as possible. Even if I'd say by numbers another lottery chance of odds i wouldn't believe. But the idea of if your right and we are the species that other worlds calls us aliens is 100% possible and kinda even more freaky then aliens visiting us first. That we are the first World to interact with another world lifeforms is possible. And for that matter the fact that we observe not interact at first seems like a logical choice for any life human or alien
WHAT IF... Aliens are super smart and have intergalactic laws which prohibit aliens to interfere with primal live without alien government permission.
Let's be honest - should we have given the middle east ak 47s? Us interfering was pretty stupid.
What if... we lock the door so the _ominous music_ orchestra can't get in and perform.
Irrational? Aren't we proof enough?
If life can develop on earth, and thrive for millions of years, then there has to be other life out there.
It is irrational to think were alone
danny ackerman There's nothing irrational about it. Like he said at the beginning of the video, we have a sample size of 1. That tells us absolutely nothing about how rare life is.
Also, given that we have absolutely no evidence that life exists outside our planet it's actually pretty irrational to just blindly believe that there must be life elsewhere.
I think that's just a failure of imagination on your part. I can certainly imagine how we could be the only life, or how it could be extremely rare. A sample size of 1 means absolutely nothing.
This is an emotional argument for people. They very badly want it to be true. Saying 'it must be true' over and over makes that pretty clear.
Nihilistic Misanthrope so basically were the only ones in this universe and what about other universe? what if we get extinct???? would that be it???? no more lifes in this universe or in other galaxies ????? soo the whole universe,galaxies are going to be empty???no life whatsoever??? because im pretty sure we didnt exist in the dinosaur era but 200,000 years ago we were made out of....well who in the hell knows!! monkeys????? i dont think so,if so?why theres still monkeys and apes on the planet still??? are they humans that didnt get a chance on evolving???
Calvin : "Sometimes I think the surest sign that intelligent life exists elsewhere in the universe is that none of it has tried to contact us."
Humanity be like: I'm not like other Sapience 🥴
I have 3 ' theories ' :
1. Since humankind is such a young species and our modern science and technology even younger, there is a possibility that there are highly advanced aliens in our galaxy that at some point in the past, when we weren't even existant, left the trails in the galaxy we try to seek today now that we are advanced enough, but in the meantime, let's say when we were still just cavemen, they might have observed us and knew that we were gonna be the dominant species on planet Earth so they decided to ' clean up ' all the trails, all the ' stuff ' they ever left in the galaxy, because maybe they just find us too primitive and not still ready to know of their existence. In other words, maybe they just don't wanna be known to exist, not quite yet.
2. On the other hand, we could be a bit imaginitive and just say that they are maybe a species that are fundamentally spiritual beings, not materialistic, therefore, they don't have the ' stuff ' to leave in space and yeah, they don't make contact with us because either they don't want to or their spiritual origin makes us unable to see them, communicate with them or interact in any way.
3. This ' theory ' is a bit conspiratorial...maybe there are, for instance, 4-5-6 highly advanced species in our galaxy that have already communicated amongst themselves and created an alliance that intends to unify our solar system and in order to do that, they formed a council with their representatives/ambassadors or something. They all agreed that no species should let humans know that they all exist, so they all agreed to that, because they find us unready. It's like in Mass Effect video game series.
All in all, don't you agree that if there are species advanced enough for interstellar travel, wouldn't it be easy for them to hide there existence? I think the possibilities are endless as to why we have zero contact or proof of their existence.
Correction: the covenant is a multi species group not just 1 species
Correction: The convenant is bad, m'kay?
I want Aliens to exist, I mean it would be pretty lonely...
What if they are evil?
+Patrick Star Pinhead Larry then we can have a badass training video for all of humanity evolving in every aspect to combat this new threat and become the true watchers of this galaxy or universe depending on how far we go
Dvid O'Donnell I didn't even think of that
+Tristan Möller hey Tristan start by checking out the billion pixel view of mars, next go to nasa websites for images of the surfaces of our planets just in pluto remember 2 things nasa blurs and colors items to hide them and to see anything zoom in and get a photo enhancing app to sharpen and deblurr. good hunting
Why always assume Aliens are Evil like in Hollywood movies ? There are far few Carnivores than Herbivore animals in any given Eco system to sustain the Food chain, So the chances are most Aliens would evolve from Passive animals. What if Aliens evolved from herbivores, say cute little bunny-like and Panda-like creatures and love to snuggle all the time ? :)
Some thoughts on alien detection:
a) what makes us think we'd recognize an alien artifact if we found it under the bed? we don't really know what are we looking for in the first place, it could be something we're so used to we'd never think of it as alien, like white noise
b) judging from our own dead civilizations, how many of those left near no stuff behind, just because stuff deteriorates rapidly over time - and we don't have billion year old civilizations
c) our detection capabilities are low (no chance of spotting aliens suntanning on some distance planets), besides the further the object, the older is the info on it;
d) how would you prove, for instance, Jupiter ISN'T a slime-ball? its close, but hey, not as we could see through its atmosphere in any way
"...I guess I'd say if it is just us... seems like an awful waste of space."
The only truly rational stance on this subject is to admit the obvious; no single absolute conclusion can be drawn, because we lack adequate data. We don't know, and we don't even know enough to constrain the problem in a quantifiable way.
This video is easily the best unbias video about the likelihood of other life in the universe.
I could talk about space for days but this video sums it up pretty well!
I agree with the theory that life is common but wipes itself out before it gets a chance to spread very far into space. Long term we cant keep going the way we are, we'll eventually run out of resources leading to more war over fuel, land and water. If we don't kill each other with war we're going to destroy our atmosphere, eventually making the planet uninhabitable before we get a chance to get off it.
How are they supposed to find intelligent life on other planets when its so damn hard to find it on earth?
And we can't even be in peace with the other organisms of our own race...and now we're looking for alien life? 😂
For me the most convincing proof that intelligent life exists is that we haven't seen it yet. Because why would it be interested in showing itself to some random ridiculous low-tech two-legged carbon life species still thinking that they are "unique"?
It's similar to making an expedition to some random Indonesia rainforest's anthill to let them know that you exist.
Alexander Sannikov There are people who do that... So if aliens were equally curious some would at least have a look.
Unless there are so many that there is not enough time. planets with life that is.
Arthur C. Clark said it best. "Two possibilities exist: Either we are alone in the Universe, or we are not. Both are equally terrifying."
This guy got his shirt from target, I have it too.
The Fermi paradox can be countered with this point:
We aren't looking in the right way.
Perhaps certain things that we think are native to this planet were brought here by aliens wether intentionally (surveying, invasion, etc) or accidentally in a crash or just misfire. Maybe Halley's Comet is really a alien space ship that returns every ~70 years to survey earth, to see if we're ready for first contact or not.
The Great Filter theory is interesting. I mean, if a society becomes technologically advanced enough to split the atom, but still firmly latches onto primitive notions of who's imaginary friend is better.......well, you could argue that we're just very lucky we managed to send something out of our solar system before nuking ourselves to oblivion.
TGF suffers from at least 2 giant leaps of imagination to work:
1. If we assume there are multiple species in the galaxy/universe TGF has to apply to all of them
2. Once a species has spread to multiple star systems (and with large 'generation ships' in transit) there has to be some exceptionally effective mechanism to erdicate a species.
1. Yes, TGF applies to everything (assuming we adhere to the theory). Some life forms would survive their own greed and pass through the filter, becoming an interstellar species. I don't see this as a giant leap of imagination. This is only, literally, the theory itself.
2. TGF doesn't apply to a species once it goes interstellar. The theory is about why we don't see other interstellar species, and posits that there is 'something' (greed, power hungry leaders, lack of interest in exploration, etc) keeping them from developing the technologies needed for long distance space travel, during earlier development stages.
You are of course able to 'tailor make' a theory to fit every phenomenon that hasn't been proven by science ("the reason life forms is becuse there are invisible magicians sail through the cosmos on light-beams"..)but every theory has to be judged on its plausibility and I personally find TGF too far out in implausibility land.
I'm not saying it's the Reapers. But it's the Reapers.
We'll bang them, ok??
You were awesome Gabe! Come back and be a guest host sometime. I miss your goofiness--who could _help_ but learn black hole physics with flying ponies?
It's the REAPERS, why people are still debating I don't understand!!
Exactly what I was thinking.
i think everyone is right. great filter sure, life being hard, sure. billions of instances where life could exist sure. i think all of these happen all the time. single cell life got wiped out just as great empires got wiped out and everything in between. if our maths about the universe is right. it is so large that things will happen that we will never see. just as things will not happen that we will not see and all the possibilities again in between. maybe life evolves to a point where we dont see it as life anymore
Goddamn ): I was damn busy doing some school projects and i find myself here, watching a last video over and over again ):
I like how "probes' are symbolized by Protoss probes from StarCraft. I think in the BroodWar expansion, if you click on a probe enough times, you can hear a WarCraft II advert in German, whose signal has just reached the Koprulu sector, where StarCraft is set and which humans reached with FTL travel. So it must be about About 504 lightyears from the solar system.
If the evolution of life on Earth is any indication, I think that microbial life in the universe is probably fairly common; complex multi-cellular life of varying intelligence but lacking the ability to create technology would be far less common; and intelligent life capable of building technology and civilizations is the least common of all. We must remember that out of all the species who have ever lived on Earth only one has evolved the intelligence and ability to create advanced technological tools. Though it may be argued that animals like dolphins are intelligent, their environment and anatomy would make it difficult for them to develop the technology needed to explore space.
However, Sagan is correct in the sense that the sheer size of the universe and the numbers of planets within it would mean that the universe is literally teaming with civilizations - even if that number is considerably lower than the amount of microbial life within the universe. Does that make sense?
technology is relative, they have pretty complex ant colonies, with ant gaurds that have chemical receptors to recieve messages through the air, without eyes, thats pretty high tech to me. they've also lasted millions of years and you can imagine the epic stories and dynasties they must have experienced, we are definately a higher level of technology but are we really? if you ever had adog hang out with you it must think youre stupid, doing boring things , what would real higher intelligence look like? it probably wouldnt make sense to us, they could be aliens that walk in circles for their utlimate high and have figured out how the universe works...? or higher intelligences could have evolved smaller, microscopic, floating through the quantum space
I think you are right. Microbial life arose pretty easily through a conjunction of odd circumstances. It is likely something like that is pretty common throughout the galaxy. As long as life exists, natural selection and fight for survival comes as a natural consequence: the more life lasts, the more chances for life taking many forms, including microbial life making colonies. For 3 billion years, Earth had just this: single microbes or colonies of microbes. Then, amazingly, life took a sharp turn: some colonies evolved to become an organism by itself (first in sponges, then in far more complex creatures). Overall, I don't think any of these circumstances are THAT special: life can easily appear, become ever more complex and resilient.
Intelligent life, though, is an EXTRAORDINARILY unlikely scenario. If you think for all the coincidences that ultimately ended up creating a species able to send galactic probes (such as Voyagers) make its chances astronomically low. It's very possible we are the only intelligent species in the whole galaxy...
The point is that intelligent life on Earth eventually sprung up because of evolution. So why wouldn't something equally similar have progressed on the billion and billions of planets with near perfect (or even more perfect) Earth-like living conditions for life to grow, thrive, and evolve?
@@SevenFootPelican - the point is that evolving to the place humanity has is difficult and uncertain. Evolution on Earth has produced many incredible and varried lifeforms with toxins, strong muscles, sharp teeth and claws, and intelligence; but in 4.5 billion years, evolution has only produced one lifeform that can smelt metals, build a radio transmitters, and launch themselves into orbit.
@@mikejones-vd3fg no, the technology capable of building a civilization is not relative.
I find the argument pretty convincing that there might be a greater tendency to grow "inwards" than "outwards". Expansion of species and civilizations happens but is not sustainable. In the end life tends to optimize itself and covers ever smaller niches.
We see it even today. Space technology is practically stagnant, while computers evolve with astonishing rates. We are already able to controll matter on the atomic scale, but there is also still a lot room in the nanoscopic. We are just in the beginning of doing much more with much less.
Aliens might expand for a while, but they gain too little in the long run. They might find themself pushed towards some kind of technological singularity, a highly optimized state with basically no will to contact outsiders.
Space technology is stagnant BECAUSE the government has no interest in pursuing the Universe. Space technology is almost completely government funded.
Remember that we went to the moon, not for the interest of discovery, and certainly not for the interest of science. We went to the Moon because we were at war, and we felt a threat.
True but leaving our planet is difficult. Information technology (for example) has a greater return of investment. That is why so much is invested in IT and so little in space exploration.
I wish we would travel to mars and other planets in our solar system; but to be honest, there is nothing of interest (except perhaps for science).
Maybe there will be a limited expansion in the near future with asteroid mining and such. However, only world wars or an environmental disaster could push us outwards.
Nik G *There is actually a lot of things that could mean a lot to humanity* this might be a long list :)
1. Mars once looked a lot like earth. But now it is a desert. There is a high possibility that what happened on Mars could also happen on earth. If we know what did happen, we could prevent the same thing on earth.
2. There is a giant asteroid bound to graze earth's atmosphere in 2029. It would be very wise to send some sort of spacecraft to land on the thing and blow it up before it becomes a threat to our satellite orbit.
3. Our world's supply of helium is running out, and synthesizing helium is a very inefficient process. Look at Jupiter though. It's mostly helium and hydrogen. PERFECT!
4. Possible life on Europa
5. Possible nuclear waste and toxic waste disposal on other planets.
6. Tourism (to boost the economy?)
7. Colonization of Mars (and save humanity)
8. And yes, asteroid mining. The world's first trillionaire will be the one who figures out how to mine asteroids.
I don't particularly understand the argument of "we've never seen alien probes so they probably don't exist". We see so many different kinds of strange objects that can't be explained by typical human technology. It seems like there is at least several types of probes inspecting this planet, and that explanation seems much more likely than Russia suddenly developed surveillance technology hundreds of years more advanced than ours but isn't using it very effectively.
Funny thing, the argument between Sagan and Fermi. Sagan started a religion basically to comically prove his point that intelligent life did not just evolve on all possible life (as we know it) supporting planets. The great succes of this religion, the basis of which even far exceeds the believability of a man walking on water, curing lepracy, rasing a man from the dead and eventually himself, has proven at least to me that even on this planet truly intelligent life is very, very rare.
isnt the 4th option that we are literally among the first intelligent species to evolve anywhere in the universe?
There's also the possibility that very few intelligent life forms have the means to leave their solar system. If we use the logic of "we don't see them flying around leaving traces" to define intelligence then doesn't that mean we are technically not "intelligent life"?
"Around two-hundred billion stars." Wow! That's got to be at least seven.
maybe the evidence is in structures like the 3 great pyramids of Egypt, aligned to Orion and the sphinx pointing at the constellation Leo, as well as many other properties, it could have been a calling card from an ancient intelligent from many cataclysms ago.
Sure! Maybe the Sphinx and the Pyramids (which were built at different times) are celestially aligned. I don't think they are, but I don't remember the evidence enough to know. However, it is far, far more likely that they were built by humans with no extraterrestrial intervention. Extraordinary claims require extraordinary evidence, and we know quite well how everything at the Giza complex could be built with the technology available to Egypt at the time.
Here's the thing--we humans are ingenuous and clever, and attributing the great works of the ancient world to alien intervention massively discredits, and quite frankly insults, the capabilities and intelligence of the species to which you and I both belong.
What I find interesting about these theories is that they never seem to entertain the idea that we haven't found anything because we simply aren't advanced enough to detect what we're looking for and/or aren't looking for the right things.
I personally believe that life itself is abundant in the universe. However, complex life is a different story, but just the mere probability, considering the number of Stars, demonstrates the likelihood of intelligent extraterrestrial life. The fact that humans exist is enough to convince me that sentient life arose elsewhere.
My response to the Fermi Paradox would be this: It raises an interesting point, but it neglects the mere size of the galaxy and just how different extraterrestrial life might be. There could be an interplanetary civilization on the other side of the galaxy, we just don't know about it because we've only been actively looking for about 50 years. Plus our methods would be considered extremely primitive to any space faring species.
***** Yeah, let's just kill everyone instead of enlightening them.
***** Intelligent alien life is most likely hundreds of light years away and not coming to Earth any time soon.
You most defiantly can enlighten the ignorant, that's what the reformation was. However, if we have to kill some people, I vote Muslims.
***** You're quite the militant atheist.
I don't care much for this subject so don't see the point in debating it. You are far more opinionated than me, so I won't stick around for too long. As for the reformation, enlightenment comes in stages. You said that it allowed secular thought to exist in the open, exactly, and that secular though is gradually making religion obsolete in the western world.
Islam is a far, far greater threat to the advancement of the human race than Christianity. To disagree is extremely delusional. Muslims are currently infiltrating western countries, and their methods are entirely violent.
Young Earth Creationist live in the backwoods of the Bible Belt. If a bunch of stupid YEC are your primary concern, then you need to come back to reality. They don't kill thousands of people in the name of God, nor do they execute people for leaving the Christian faith, nor are their hundreds of thousands of Christians trying to concur the world and kill anyone who resist. Muslims do, Islamic countries do, that is the difference. Most Christians are just culturally Christian anyway.
I will now reverse your logic on you. You are correct, we are primitive life forms. So what makes you think aliens will even have the ability to locate us? Let alone fly over and say hello.
If they are a space faring society then they are thousands, perhaps millions of years more advanced than us. However, these are, when you get down to it, just assumptions. A species that evolved in entirely different conditions can be so vastly different from humans that communicating with them could be impossible.
In any case, to them we would more so resemble ants, rather than a candidate for them to come and sweep us off our primitive feet. With or without religion we are still just civilized apes, that applies to you, me and the entire human race. You getting hard over exterminated Christians is just tribal instinct, and not much more.
Soon we will be dead and that will be it. This life is most likely all we have. We will probably never live to see first contact, unless simple organisms live on Mars or Europa. Otherwise, us and our existence, is like you said, primitive and essentially pointless. In that case, I suggest you throw away your genocidal fantasies and just enjoy the small amount of time we have, every second of it, because it's running out, for all of us.
***** I don't know why you're so concerned with YECs. They're a laughing stock to the entire intellectual world. If any religious group posses a threat to humanity, it is Islam, that is undeniable.
***** Young Earth Creationist do not control the world.
Can't you just relax and be happy?
two of my personal favorite answers to the Fermi paradox:
1. the one my religion supports: God exists, and made life on a lot of planets, we’re just either unique or unusual in that we made Bad Choices, and most of the universe didn’t. so we’re (one of?) the only planet(s?) to fight wars or die or want to colonize other civilizations and everyone else is staying the heck away from us and out of view
2. there’s intelligent alien life and maybe we’ve seen a lot of evidence for it but we don’t know what we’re looking at because the vast majority of aliens are just so different from us. maybe the habitable zone is only our habitable zone. maybe no other species has developed technology that we recognize as technology. maybe alien intelligence exists that we wouldn’t even think to consider life or therefore intelligence. maybe when we look at exoplanet atmospheres for whatever waste gases we think alien organisms are going to produce we’re dead wrong.
basically the theories are 1. we’re sick and 2. we’re stupid and i’m pretty sure both are true
As a pretty artistic person, I'd rather believe in Sagan's camp, as even if I'm never able to see evidence or examples of completely alien life, it is still immensely fun to fantasize about what could be and or has been out there.
zoo hypothesis explains it all rationally and is very viable and in my opinion very probable option
maybe we're like fish in the aquarium? or maybe lifespan of everything has its limit to reach each other?
Covenant is a multiple-species group, there's the Sanghelli (Elites), Unggoy (Grunts), Kig-Yar (Jackals and Skirmishers), Lekgolo (Hunters), Huragok (Engineers), San'Shyuum (Prophets), Jiralhanae (Brutes) and Yanme'e (Drones) TL,DR; Covenant is a LOT of species
"Maybe we're looking in the wrong places" & "only 20M years to colonize the galaxy"... perhaps actual advanced alien civilizations have already shrouded all of the stars in Dyson swarms, and so are now dark on our skies... by allowing ourselves to fixate on bright starry galaxies, instead of peering into the seemingly black voids "off to the sides", perhaps we are looking in the wrong places and overlooking those who cosmically quickly inhabited their now-dark galaxies?
What annoys me is when people say 'oh well there won't be life there, there is no water' etc etc but how do we know that aliens need alternative means to survive? Can someone answer me is question because I hear it almost every space video
+Dom Harper this is exactly what i feel.. why should water or oxygen or any of those things that are deemed essential for us even necessary for beings who have entirely different physiology and metabolism system.
+Sukrit Chandra earth is a good example of that. Even on this single planet we have many different types of life that take in energy many different ways, and are built to withstand extreme places and thrive, like sulfuric pools or deep in the ocean or even inside frozen glaciers
canihave2bucks like archaebacteria and anaerobic prokaryotes, ikr?
+Dom Harper Funny thing is water is everywhere in space. Well, at least hydrogen is.
+Dom Harper That's a good point. I was thinking about that too. What if there is life on Venus, Pluto, or even a sun?
How do we know aliens haven't seen our world already and just flew right by?
i think aliens is there out there but a one with iq i dont think something other than use humans has that. even the chance of us humans to be this smart was relly crazy low its was all luck on our part
*****
meh humans think that it has been a long time since the creation of the universe that there must be aliens but to be honest in the grand scale of things our universe was just born so i dont think there is another lifeform that has the same lvl as ours
*****
yep i think so too
+ Fiif I personally believe that intelligent life is out there, but we also have to take into consideration that A - the galaxy is damn big by our perspective at 100kly across, B - those same distances mean that getting from one start to another, even if we solved the FTL problem is still a massive and expensive (not to mention resource intensive) undertaking, and C - the number of habitable planets by our definition of habitable (meaning we have a _chance_ to survive on it without a lot of help) is far smaller than the number of potentially habitable planets.
Also, the third option, that intelligent species only exist for a (relatively) brief period of time before going extinct has to be taken into consideration.
Also, megastructures? A Dyson Sphere, or the more technically feasible Dyson Swarm takes enough resources that we'd need to use just about everything in our solar system to make one, and the most optimistic estimate for completing one is still around a few hundred thousand to a million years. I say a Dyson swarm due to the fact that many who envision something like a sphere tend to forget that in space, _everything_ is moving. to make a structure that can encircle a star, use its energy, and move with it, is no small challenge.
Besides, even if we saw it from here, would we recognize it as artificial?
Improbable events may be very much so.
With a needle ,inscribe the word -life , on a grain of sand.
Calculate the odds of finding a second one only by examining the first.
(Then if you want,, start looking for the match. )
My point is, that you already know the match is possibly improbable , and you have no means to calculate the probability of finding a match, until you find a second and know how many grains you've inspected.
“But hey! Extinction - exmintion, right?” That’s the best phrase on the entire TH-cam! 🚀📺👽
You know what's irrational to believe in?
Religion
*COME AT ME SCRUBLORDS*
😂😂😂😂😂😂😂😂😂😂
know what else is irrational? Fundamentalist beliefin an answer for an unanswerable question.
+InfinityV0rtex And when you finally meet your maker he will ask you: "You have anything else smart to say?"
+InfinityV0rtex Don't tell me you're also the guy who complains about religion coming up in the comment section
rucussing
And then the maker's sister will chime in without saying a word (because being a supernatural, semi-powerful being makes any form of communication [voice/thought/kinetics] optional), would express to both of them:
"Pay no mind to my brother. He's just an insecure, vengeful, immoral bully who gets satisfaction from terrifying mortal creatures into worshiping him. I apologize for the threats his followers have directed towards you throughout your life; not that you need this apology -- you already had the intellectual capacity to understand the emptiness of their threats. But with that aside, welcome to this brief afterlife, as it will exist as long as you wish it to, and after which you will cease to experience, and cease to be."
And with that the brother grumbles after being embarrassed for having his childish behavior exposed by his wiser, kinder, more mature sister.
If the universe is infinite and we confirmed to be here, it makes it pretty much statistically impossible that we are alone.
The third option/theory, "The Great Filter" :), is (likely) the correct one.
Imagine the following, not at all implausible, scenario:
The first civilisations in the galaxy invariably observed that coexisting with other civilisations lead inevitably to devastating wars, so after a huge intergalactic conflict, the victorious faction (we'll call them, the Originals) decided to wipe out (or reset) any civilisation that reaches a certain state of development that enables them to colonize other worlds, thus ensuring a long lasting peace whose only de-facto purpose is to keep the Originals safe. This civilisation created self replicating discrete entities that kept in check the entire galaxy (we'll call them the Watchers). Their only purpose was to observe and reset civilizations when they reach a state that could poze a threat to the "eternal peace". The Originals remain hidden in alternate realities that are not subject to the limitations of the physical realm. Their civilization will always remain hidden to the newly sprung civilisations, with the notable exception of their apparently shy creation, the Watchers.
How likely is for a probe to travel through the galaxy like that, for millions of years? Also, isn't true that radio signals "decay" over time, in a way that our signals might travel through the galaxy but soon become just a noise to a receiver?
I sometimes wonder how sugar dissolves when I stir my coffee then I remember I'm not a scientist so I get hungry and have a biscuit too
The water breaks down the crystal structure of the sugar then it dissolves into a liquid
Hahaha
IT was a joke
What if you were a scientist all along, without even knowing it - by asking yourself this question?
This is like when the perfect girl tells you she likes you but is not ready for a relationship.
1. She is lying to spare your feelings and is just not into you
2. She is telling the truth and likes you
In the end it does not matter since you will not be with her either way.
Considering size of observable universe it is rather unlikely that we are the only species creating what we call "civilization". But when we talk about contact, we can really talk only about our galaxy, and maybe only a part of it, which is much much smaller, and when probability that we are the only ones is rather big
One partial solution to the Fermi paradox was suggested by Matt O'Dowd on an episode of Space Time. The partial solution is that only Type Ia supernovae can create the materials necessary for life. A Type Ia supernova occurs when either (a) A white dwarf star acquires enough material from a companion star to begin to collapse toward neutron star density, but ignites instead, or (b) Two white dwarf stars merge and ignite. The main idea is that white dwarf stars take a long time to form. If a star identical to our sun had been born at the beginning of the Big Bang, it would have reached the white dwarf stage about 3.8 billion years ago, too late to have produced the matter than makes up our solar system. White dwarf stars descended from more massive stars would take a shorter time to form, but that time would still amount to billions of years. Hence, life-supporting planets would only have formed recently. This idea has one piece of evidence in its favor: white dwarf stars are extremely rich in carbon and oxygen, and the explosion of such a star would presumably eject a great deal of carbon and oxygen into space. If type Ia supernovae were frequent in the past, it could explain why carbon and oxygen are so plentiful in the universe.
I personally find the 'Fermi Paradox' a bit odd, if not flat out wrong. The simple fact simply boils down to the distance between each galaxy. The simple fact that obviously did not, or was not included in the so called 'Fermi Paradox'.
As we know it today, the earth is roughly 44.5 Billion years old. Given the rate of F type main sequence stars live about 10 Billion years, give or take a few millenia. So if intelligent life evolved in a galaxy, oh let's just say 30 million light years away, then the energy, light, radio signals travel only at the speed of light...(I'll leave the math to you as a exercise, however, I'll give a hint for those who are unaware. Light travels at a universal constant that cannot change. That constant is roughly 176,000 MPH per second. It takes just about 8 minutes for the light from the Sun to reach Earth, the Sun could explode and we wouldn't even know it until 8 minutes later.
Now, having said all that, I'll sum everything nicely. Our sun is expected to run it course, having fused all the hydrogen and helium into a new element. So, it the it begins to fuse metals until it reaches the stage where It needs to fuse iron but cannot, which is the stars hard limit.
Now with all this in mind, (knowing that our solar system, Earth included) is approximately 4.5 Billion years old. So how do we compare our galaxy (which is now a middle aged star) to that of a star and solar system that is 20 million years away? That galaxy is my now a dead system, it took 20 million years for the light from that system to reach us by a huge stroke of good fortune, (unless they found a way to migrate to another star system). If the life in that system could not relocate, it would most certainly have died out a LONG time ago. hence the reason we have not heard from them, or most other star systems within our galaxy for that matter, let alone another galaxy which could be hundreds of millions light years away.
Just consider for a moment our own local neighborhood, say the Orion Belt, which is on average 1024.3 light years away. So the light from our local neighbors we see in the winter sky, is light that took 1024 years to reach earth.
So, where are the aliens? Most likely they have come and gone by now, that is if they didn't originate from one of the many stars that are within 20 or 30 light years away.
Forgive me, the second paragraph should have stated '4.5 Billion years old'.
I agree the paradox seems pretty stupid since it can exist with intelligent life still around. It doesn't take into account the size of space and how rare the possibility of any meaningful space travel is.
You mixed up galaxy and star system. The next star is about 4.3 lightyears away ;)
um, earth is 44.5 BILLION YEARS OLD? check your dictionary again bro
It was just a typo, dude. Curb your trollishness.
Intelligent live does not mean civilization. If the ice age never ended or if the geography was jut slightly different the farming would never exist. And if the geography of Europe was different the modern science would never exist.
Finally found a pbs video I could understand
Also I may add one theory of my own: What if we are absolutely primitive in terms of how travelling in space may be? We need to consider how deadly is for our bodies to go out there, even just in a trip to Mars, we need to consider that we have ways to travel that take decades just to travel in our own solar system, we need to consider that speed of light and current physics notions make impossible to improve our chances of even send machinery to far distant planets. And this should happen to every new species looking to the sky. So here is my theory, what if space travel, and space survival as a living being, is so far in technological advancement that may look like "true magic" to us? It was Sagan who suggested this several times, and may be possible. What if spaceships trample with dimensions? the same for "radio signals" (something that is more that possible no smart species ever use) different living beings may be advanced enough that their technology is undetectable by us, not even considering that we are really far to detect everything flying around us, not even at close distances. If as I said in my previous post, other aliens are really dangerous, not because they or we are "evil" but by the fact of the threath of incommunication. Aliens species are far to want to be discovered, if a very advanced technology is also capable of dealing with FTL travelling, it may be really possible that we would not be able at all to detect such tampering with "reality".
play video at 0.5x speed for regular speed
Its a mathematical impossibility that Earth is the only place where life exists in the universe.
BloodofPatriots Not a mathematical impossibility, but a mathematical improbability.
Kisama001 No, its a mathematical improbability there's "intelligent life" elsewhere in the universe. Its a mathematical impossibility there's no other "life" in the universe.
BloodofPatriots depens if the universe is finite or not;
if it's infinite life exists somewhere else,
if it's finite, life may or may not exist (somewhere else)
Sporarum Hōshi Apparently, You have no comprehension of how large the universe is. Let's do a thought exercise. We know that there are an estimated 3 billion stars in our galaxy. We know there are an estimated 100 billion galaxies in the visible universe. We know that the process of star formation also leads to planetary formation as well. let's assume that each star produces 2 planets, (most will produce more, some fewer). These 3 numbers are all we need to infer the probability of life else where in the universe.
3 billion X 100 billion X 2 = 6e20 (6,000,000,000,000,000,000,000).
1% of this number is 3.65616e13 (360,000,000,005,626)
Let's go further. Let's assume that number is far below 1%. How about 1000th of a present?
1000 of a present of this number is 3.65616e13 X .0001 (360,000)
If we assume that only 1 planet in a galaxy produces life, then that brings our total back up to 100 billion.
The physics that lead to the formation of our sun, and planets, works the same throughout the visible universe. We are not special.
No matter how you look at it, the probability that we are the only life in the universe is very remote.
Kisama001 I know it's crazy big ^^, but we have not perceived any, so we have no "proof", only statistics. We can speculate, but we don't know.
Option 1: extraterrestrials are abundant, but we are unable to detect them.
Option 2: extraterrestrials are numerous, but spatially sparse. There are plenty of space-faring ET civs in our galaxy, but their footprint is much smaller than the galaxy. We are wandering in a vast desert, looking for tire tracks that are a hundred miles away.
Option 3: extraterrestrials are common to develop, but are first (one civ will end up being first).
Great episode!
Its irrational to think there arent aliens
Why? Both side of the argument are playing the odds, there is no solid evidence anyway.
thinking there's no life in the entire universe other than earth is like taking a cup of water from the ocean and thinking there's no fish in it
Brian Schurr What if I tell you some other scientist worked that the odds of life naturally emerges is 1 out of 10 to the power of 110 or more. Then your ocean or universe which is unfortunately curved and limited, is too small to support the second chance of life.
You need to be open to learn from both side of the arguments. I know some secular scientists hate to admit anything about Earth is special in the universe, but I have to remind these guys, it is very unprofessional to bring any emotion into this subject.
there have been experiments that show that common planet forming processes almost inevitably lead to organic molecules. Granted it is a long way from organic molecules to complex, let alone intelligent, life, but the odds are not that high.
Alan Klughammer There is almost no naturally forming organic molecules are very loyal at passing on information, that is the most crucial part of Abiogenesis. That is why some scientist proposed clay crystal theory rather than organic molecules, at least clay crystal does duplicate in its likelihood. And overwhelming amount of pre-Precambrian fossils showing lives back then were silicate based, not carbonate as we are familiar with.
Given it is still impossible for human technology at today's level to create lives with the complex organic molecules we can easily create. It is too naive to say the odds are not high. Once again, the key is to carry information and pass it on.
Its irrational to not believe they exist
Nico G Also, if other intelligent life was detected, don't you think that our governments and people of higher powers would hide it from the public. I could see them doing so in fear that it would create chaos.
Bruce Crawford I have seen very little evidence of enough competence in any government to really hide something that monumental. They might try, but if there was any significant evidence they would almost certainly be examining it. That means technicians, scientists, engineers and the government employees themselves. You have to go back to the old saying. Two people can keep a secret, if one of them is dead.
Robert Winchester Although it doesn't take much to cover a leak... just spam the media with hoaxes and the truth is lost. Doesn't take a genius to do that.
Bruce Crawford I believe your conclusions are sound, but your motives are not. I believe they would hide it to gain an upper hand against other nations (aka. advance in military warfare). Like all technologies, it's available for the military decades before it's available for the public.
Nico G "Its irrational to not believe they exist"
Wrong. Read Paul Davies "the Fifth Miracle" and you'll learn why it's the base assumptions in the Drake Equation that are wrong. The development of life, or at least organic life as we know it, and by this I mean simple self-assembling proteins, is about 1 in 500 trillion.
You need to take some simple amino acids, of which there are about 500 known types, and then assemble them in a chain that self replicates, of which we know of only one way, which is made of a chain millions of base pairs long. All this has to happen on a planet that is rocky, has water, gets enough energy to sustain chemical chain reactions, but not so much that it blows apart that simple life after it's created, and has a protective shell that protects that life as it develops, meaning both an atmosphere and a magnetosphere.
If there is one life form per galaxy, we're beating the odds.
Perhaps it's how Douglas Adams describes it in "So Long, and Thanks for All the Fish" that we are "Far out in the uncharted backwaters of the unfashionable end of the western spiral arm of the galaxy"
Problem with the Great Filter is that it doesn't erase traces of civilizations that are already out in the cosmos like radio signals. We could still detect that kind of stuff.
Religion is the great evolutionary filter. We would be exploring other solar systems by now if we weren't killing each other to prove our god is greatest.
Aggression is part of the human nature, we would kill each other without religion too, we just would use a different excuse for doing so.
Politics, money, genitalia, skin color, background, birthplace, muscle mass, intelligence, clothes, eating habits, spouses, who gets to go first in the new frontier, somebody else's opinion on an online video comment... you name it.
Funny how folks like to throw blame and point fingers just to cover up their own part in the problem.
If you really to explore space stop being a chauvinist and go build a space ship.
Or they are avoiding Earth.
In some book I’ve read this example is given to show the unlikelihood of any alien world contacting any other - to paraphrase:
Imagine an experiment where a village of hundreds of homes are instructed each to rouse at any non-specific time during a dark night and for only a second flip on and off one light. As an observer on a hill overlooking the village, watching for a light, but allowed to look for only one second during that long night, how likely is it that the observer would see a light?
This is how the cosmologist writer (maybe it was de Grass Tyson ?) wanted to express the near impossibility of one civilization in contact with another. Over the billions of years even if countless of intelligent beings had spawned across even just our galaxy, not to say others, the coming and going of their species, would doubtless not last long enough for their light to be found.
Moreover, in ancient years, had aliens lived on Earth, all evidence of their time here would by now be subsumed within, under, the Earth’s plates.
Building enough technology to get to outer space before choking to death on our own waste seems like a plausible explanation and probable future.....
Maybe we are the first intelligent species to ever evolve in the entire milky way galaxy, I mean there has to be a first.
While entirely possible, that is extremely unlikely. Odds are, we're neither first nor last.
I think that could be not only right, but true, according with the actual evidence. Live is I Earth for billions of years, and only we were capable of creating civilizations. Internet intelligent life as ourselves may be too much rare and unlikely, even through billions of planets.
It's possible but extraordinarily unlikely. I would say we are not the first.
I think it's clear that life like ours exists and has existed but it for the most part perished without meaningful space travel. This could be simply because space travel is just hard and humans have other challenges to deal with in the first place. Even today we as a species are not highly focused on space exploration or travel, not even close.
Its extremely unlikely that there isn't intelligent life somewhere in the universe, but there is a fair chance that we are the first intelligent species in the milky way. "200 billion habitable planets" in the milky way is an extremely generous estimate. This doesn't take in account many life eliminating factors, the least of which include: The age of the local star, the area of the galaxy in which the system is located (since space is very volatile near the center of the galaxy), the rarity of protective atmospheres and ozone layers or the equivalent forming on those planets...etc. Considering we still don't know for sure how life originated on Earth or how multicellular life evolved from unicellular life, the chances of those steps occurring on any one habitable planet could be very low. We are the only intelligent species to have ever evolved in Earth's 4 billion year history, which indicates that intelligent life evolving on any given planet that has life is extremely low. Even if intelligent life comes into existence it could be wiped out by extinction events either brought on by itself or by outside forces. The lack of evidence for aliens in our galaxy IS evidence that they don't exist yet. Sadly...
There are thousands of people who have had contact experiences. Are all of these fantasy?
More than likely, yes
@@zackachary i dunno about that chief
UFOs as in intelligent and advanced phenomenon is basically ufficial
No more than two neurons are needed to understand that the technology displayed by those crafts is inhuman
Every time the topic of Aliens is presented, I instantly think of the Sesame Street song that I heard as a child, "One of these things, do not belong here," and that thing that does not belong here, is us! From all of the discoveries made to the present, everything else that we have learned, is that everything else is working the way it was designed to, since it all is doing what it was designed to do from the beginning of it all, that we can understand. Except us! This solar system, this planet, even us, are the one thing that is entirely different, than the rest of the way the Great Machine works! Just a basic thought to ponder...!
Often, when we say "intelligence", we actually mean technological... It may be that what is special about us is not our intelligence, but our use of technology, and that there are plenty of intelligent aliens who do not use, or need, technologies that we can detect.
Cant we just say that, 1st we havent developed right technology, 2nd you said in a video that our galaxy is spread so far apart that if andromeda galaxy collides its extremely rare chance that earth would be destroyed, and we are talking about massive galaxy, how is a small planet, civilization or life even be compared. so i think even if there's alien its just we havent crossed each others path yet
an example its like 2 people walking in a sahara desert, from 2 ends, whats the probabilty of them actually crossing each others path :D
an example its like 2 people walking in a sahara desert, from 2 ends, whats the probabilty of them actually crossing each others path :D
+Anirudh Dad But if both people leave a trail of pointed stones every few steps, they will in a few months, find each other. This example is explained well by xkcd in his what if book.
+Theatomix Gaming What is the probability of that happening? Even if they both leave trails what are the probability that those trails can be found? What if dust covered those stones? What if two of them while walking have different spacing of rocks? What if those 2 person are walking in a different path which is 10km apart? Chances are there are intelligent life we just have a different method of doing things.
Earl Scottie Buenafe Yeah, it's not the best, it's something at least.
Another problem is that one has to cross the path first (already unlikely), see it, don't lose it, and actually find the person. He could even just not see the other even of 10 meters apart, depending on the enviroment.
in an infinite universe, there must be infinite possibilities for life.
+PATRICIA EVANS oops dat grammar though.
That is a very good observation and thought.
+PATRICIA EVANS Infinite is not possible. only repeating. infinite has no value. also if the universe was infinite, that would mean that the speed of light is also infinite because the universe is always expanding :)
***** the speed of light isn't infinite, just unreachable by anything but light. Also if it repeats forever and ever then that would make it infinite.
PATRICIA EVANS but if infinite does not have a volume then what is it?
The 10 billion years probably also ignores the fact the there has to be time for the essential heavy metals to be distributed in large enough quantities to make technological advancement into interstellar travel possible. Fermi paradox also ignores that it would take a lot of probes sent through to be found in our level of exploration. The radio signals could also be a timing issue.
What happens if we are among the first?
there is also the hypothesis that we are one of the first species in the whole Universe. I mean, when life on Earth came to existence, there was still a lot of turbulence, many rock hitting Earth, etc. Maybe the habitable planets where life exists are still forming.
If we assume our civilization isn't an outlier then it's fairly easy to see why we haven't seen evidence of alien life. Based of this assumption, the time it takes for an average intelligent civilization to reach outside the solar system is the current age of the universe. There may be many intelligent civilizations, but they're only in their early stages of interstellar travel just as we are. Maybe there are outliers ahead of the curve but how likely is it that those outliers are in the neighborhood?
I have an interesting 4th theory (credit to Dr. Robert Lanza) that actually DOES involve us being special... We know that consciousness plays some kind of role in shaping the universe.. In experiments like the double-slit or the delayed-choice quantum eraser, the universe seems to bend over backwards to be both a smeared out probability wave when we're not looking, and have a defined state (and history) when we are looking... So you may see where I'm going with this... What if this particular universe we live in evolved from collapsing wave functions around what seems to be one of the more probable conscious entities (in our case, us - see anthropic principle).. Our universe, which started as a gigantic probability wave of all possibilities, slowly, incrementally collapsed, if only for an instant, to a universe where conscious entities like us exist (which further collapsed and defined the universe upon our observation fitted with a logical history in our "timeline".
I realize how far out there this theory seems, but it's called Biocentrism and is actually taken quite seriously in some physicist circles. It would also solve the Fermi and Sagan paradoxes of why we don't see other life when we should. This universe really was made for us.
"The hitch hikers guide to the galaxy" gives a convincing reason. "Space is big, really really big" essentially infinite. "And any number divided by infinity is as close to zero as makes no difference"
2:33 Okay, you beat me to it.
We are special. Alien beliefs are wishful hopes of people who refuse to accept that there is a God and he created us in his unique image.
His unique imagine being everything from dwarves to giants, rail thin supermodels to 800lbs obese people, males to females, round eyed caucasins to slant eyed asians, people of every skin tone from milk white to midnight black, people born of both genders, etc?
Then why do all DOGS go to heaven, huh?
I am of a similar opinion. At least, concerning the divine. I believe that all deities exist. However, that does not mean that aliens do not exist, nor does it mean we are not special. After all, if aliens do exist, they probably have their own deities. That would make them just as special as us, wouldn't it?
I disagree completely. As the comments above me have stated, there are signs and examples of differences in everything! It's even deeply routed in our DNA and genetics. The statement humans were created in Gods image backs this up. Plus it's just statistically impossible to say life doesn't exist elsewhere since space is continually expanding, and we have yet to discover all galaxies and planets.
"Alien beliefs are wishful hopes of people who refuse to accept that there is a God"
Belief in God is the epitome of wishful hoping.
my theory : they don't exist. -THUG LIFE
Well I was dancing between Drake´s equation and Fermi´s paradox for long time until I read "the 3body problem" trilogy, and even if it is a scifi book and not "science" the proposal of the writer with his "Dark Forest" theory, is so logic and fits so well between Drake and Fermi, that is fucking scary, and not only because is a dark theory, but because it has so many "common" things to compare with, from our wars, the difficulty of communication, to survival of the species, to how devastating and difficult living may be, is in some way similar to the Great Filter theory, but darker. Scientists like Stephen Hawkings were a bit into this, saying clearly several times, that alien contact could be devastating.
It’s tricky to be strictly a saganite, a fermian or a « bostrus » because this universe seems like a bunch of ideas that happen to converge creating this experience.
Please go easy on the hand gestures.
Your hands are more active than Cam's on Modern family. It's really distracting.
Otherwise a good video.
Just. Speak. Slower. Please...
0.5 speed works great. He sounds a bit drunk... but makes it funnier.. and MUCH easier to follow lol
Ur brain works slowly. Catch up
Some thing that is never mentioned in these arguments is that it takes about half of the length of time the universe has been around to evolve the bio chemistry to support one cell. If earth was destroyed what are the chances we could evolve multicellular life again? More importantly how long would it take? From what I understand the universe is in midlife. If there is no other life yet, there may also be not enough time to go multicellular if one must start from “scratch”.
the Fermi paradox comes from a level 0 civilization perspective , the fact we dont see anything could be as simple as efficiency ,. its quite easy to see for me at least, that one of the perks of leveling up might be the choice of whether or not your seen at all. ,.
Christians tell me that God says I am special.
They don't know what their God says nor do they know one exists. Their parents told them at a young age that an ancient book called the bible holds the truth.
They also says that everyone is special with is just another way of saying that no one are special. All of this is stated even thou the fundamental of Christianity clearly states that you can't know anything about God. If you begin at book with a statement that this book is by nature not true since it deals with something that can't be know it should be a hint not to take i literally. And this is interesting, since if you believe that the bible contains true information about God you really should not call yourself christian in the first place. There is no way even for God to make you understand it in any true sense.
The Bible says that mankind is God's purpose for creating the universe. A temporary place where mankind gets the opportunity to choose to know God, this is based upon God being love. Atheists demand God show himself to prove his existence but Christ (being God as a human) showed how God responds to the demand (Matthew 16:1-4), he simply ignores it. "Speak to the hand because I ain't listening." God won't force a person to believe because it's a matter of the heart. The Bible is written in parables and symbols, literal happenings with deeper spiritual and prophetic meanings. Christ told us why it's written like that, if a person truly wants to know they'll know, if they don't want to know then it remains hidden from them. And one can only experience the depths of love, know the character of God, when there are consequences to one's decisions. Having free will, because God is love, necessitates the capacity to choose evil which can have disastrous consequences. And only with evil being present can we experience love.
But, sticking to the topic, if you read the Bible it doesn't deny nor confirm the existence of extraterrestrial life, hence why many believers enjoy videos such as this. Believers are free to believe other life exists, free to study the inner workings of the universe.
And believers are also free to study the sciences, to understand and explore the universe, to even believe in evolution.
Day 1 - Big Bang
Day 2 - Formation of the solar system
Day 3 - Earth cools, oceans form, dry land appears followed by first simple life.
Day 4 - Photosynthesis produces oxygen which clears the atmosphere allowing the sun, moon and stars to become visible.
Day 5 - Cambrian Explosion, flying creatures and dinosaurs.
Day 6- Evolution of mammals and mankind.
You see, Genesis was right, it syncs with current science. And Genesis 2:4-7 summarises Day 3 until 6 (a period of about 4 billion years), there was no man to till the earth so God caused a mist to come up from the earth to water it. Then God formed mankind from the dust of the earth. In other words, the earth cooled, the hot molten rocks began to solidy, forcing the water up as water vapour which condenced and formed the oceans. Eventually, via one helluva long process, God formed mankind from the elements of the earth. God used evolution to form mankind. Why is it assumed the process was instantaneous? Just because Ken Ham says so?
And twice, directly, in the first 6 chapters the Bible it mentions other humans, other than Adam and Eve, being present on earth. And then one time it is implied. Firstly Adam was separated and placed in a secure area. It's implied he was being protected from others. Then Cain kills his brother (chapter 4) and fears that other humans would kill him if he becomes a lone wanderer. In the same passage it said he found a wife and had children, and this preceded Adam and Eve having other children. So Adam wasn't the first human, rather the first chosen, separated from other humans and placed buttnaked in a secure area. Then in chapter 6 we see the sons of God (Adam's descendents) found wives (the daughters of men) from other humans. There was no incest. The Bible doesn't deny other humans pre existing Adam.
And Noah's flood in the Hebrew says it was local, not global. Only life in the region died, not all life on earth. Noah only took animals native to the area, mainly domesticated by then. So no giraffes, no penguins, no marsupials. The Aborigines didn't piss God off, he left them in peace. Enoch and Noah preached to the people in the reigion, for over a hundred years, but they kept becoming more selfish and violent. They were warned time and time again. They had no excuse. Just like the Christians are warning people of Christ's return. And this is why Genesis 1 was divided in 7 periods called days. God was telling us that mankind has 6000 years to work, an opportunity to believe in Him based on an individual choice that stems from the heart, followed by 1000 years of peace, a time to rest. And using the Hebrew calendar, starting at Adam's fall, it's the year 5983. 17 years shy of it being 6000 years. The Bible said it would take 2000 years (the 5th and 6th millennia) from Christ's crucifixion until his return. Before you say Christ isn't coming back anymore, mock me for being a believer, saying how people should pursue their individual desires and that God doesn't exist because there's no sign of him since life has flowed naturally since the beginning of creation (the universe), please read 2 Peter 3. Read the chapter but focus on verses 3 and 4, you should see it speaking directly of you.
The Jews want to build a temple, the world wants Israel to sign a peace accord and divide their land. The world, especially this week, speaking of coming nuclear war. The Muslims calling to unite under one caliphate. People leaving the faith to pursue a watered-down version of Christianity and even leaving the faith completely to follow other ideologies. Earthquakes, famines, hurricanes, diseases. Wars, rumours of war. Division among family members. None of these are a surprise to believers, because the Bible foretold all of this.
Matt, summary please. I don't feel like reading an essay.
Well, scientists say you are worthless and life is nihilistic. They avoid anything that smacks of special because they are prejudiced against theistic world views. Their beliefs about aliens is just as much faith as another's belief about God.
The resolution to the Fermi paradox may not be so elusive. The first one or two species to crack the code on traveling across the galaxy in a reasonable amount of time came to the reasonable conclusion: no contact until that species is also capable of Interstellar travel, because such an effort is a global effort and the species must have learned enduring peace in order to accomplish it.
It's important to remember that we're basically stranded on Earth - everything we've learned about the greater universe around us was only learned via telescopes and probes. So of COURSE we haven't found intelligent life on other planets, yet. We're basically Castaways on a desert island throwing bottled messages into the water and watching the horizon for ships - it's not that we're alone, it's that we're REALLY cut off from the rest of the universe.
I've just found this channel, so I'm hoping you can still see comments on your older videos. Someone may have already said this, but I'd like to add that in a galaxy as old as the Milky Way, intelligent life could have indeed evolved on other planets...but not at the same time. You mentioned extinction. There is also regression. It would be difficult to encounter alien races that don't exist in our time. This is complicated even further by vast distances that would give us the time to encounter those races.