The Fermi Paradox — Where Are All The Aliens? (1/2)

The Fermi Paradox — Where Are All The Aliens? (1/2)

Are we the only living things in the entire universe? The observable universe is about 90 billion light years in diameter. There are at least one hundred billion galaxies, each with one hundred to one thousand billion stars. Recently, we’ve learned that planets are very common too. And, there are probably trillions and trillions of habitable planets in the universe. Which means, there should be lots of opportunity for life to develop and exist. But where is it? Shouldn’t the universe be teaming with spaceships? Let’s take a step back. Even if there are alien civilizations in other galaxies, there’s no way we’ll ever know about them. Basically, everything outside our direct galactic neighborhood, the so called “Local Group”, is pretty much out of our reach forever, because of the expansion of the universe. Even if we had really fast spaceships, it would literally take billions of years to reach these places, traveling through the emptiest areas in the universe. So, let’s focus on the Milky Way. The Milky Way is our home galaxy. It consists of up the four hundred billion stars. That’s a lot of stars, roughly ten thousand for every grain of sand on earth. There are about twenty billion sunlike stars in the Milky Way, and estimates suggest that a fifth of them, have an earth sized planet in it’s habitable zone, the area with conditions that enable life to exist. If only zero point one percent of those planet harbor life, there would be one million planets with life in the milky way. But wait, there’s more. The Milky Way is about thirteen billion years old. In the beginning, it would not have been a good place for life, because things exploded a lot. But after one to two billion years, the first habitable planet was born. Earth is only four billions years old, so there have probably been trillions of chances for life to develop on other planets in the past. If only a single one of them had developed into a space traveling super civilization, we would have noticed by now. What would such a civilization look like? There are three categories. A type one civilization would be able to access the whole energy available on its planet. In case you are wondering, we are currently around zero point seven three on the scale, and we should reach type one sometime in the next couple hundred years. Type two would be a civilization capable of harnessing all of the energy of its home star. This would require some serious science fiction, but it is doable in principle. Concepts like the Dyson Sphere, a giant complex surrounding the sun, would be conceivable. Type three is a civilization that basically controls it’s whole galaxy and its energy An alien race this advanced would probably be godlike to us. But why should we be able to see such an alien civilization in the first place? If we were to build generation spaceships that could sustain a population for around one-thousand years, we could colonize the whole galaxy in two million years. Sounds like a long time, but remember, the milky way is huge. So, if it takes a couple of million years to colonize the entire galaxy, and there are possibly millions, if not billions of planets that sustain life in the milky way, and these other life forms have had considerably more time than we’ve had, then, where are all the aliens? This, is the Fermi Paradox, and nobody has an answer to it. But we do have some ideas. Let’s talk about filters. A filter in this context represents a barrier that is really hard for life to overcome. They come in various degrees of scary. One: There are Great Filters and we’ve passed them. Maybe it is way harder for complex life to develop then we think. The process, allowing life to begin, hasn’t yet been completely figured out, and the conditions required may be really complicated. Maybe in the past, the Universe was way more hostile, and only recently things have cooled down to make complex life possible. This would also mean that we may be unique, or at least one of the first, if not the first civilization in the entire Universe. Two: There are Great Filters and they are ahead of us. This one, would be really really bad. Maybe life on our level exists everywhere in the Universe but it gets destroyed when it reaches a certain point, a point that lies ahead of us. For example, awesome future technology exists, but when activated, it destroys the planet. The last words of every advanced civilization would be: “This new device will solve all of our problems, once I push this button!” If this is true, then we are closer to the end then the beginning of human existence. Or, maybe there is an ancient type three civilization, that monitors the universe, and once a civilization is advanced enough, it gets eliminated, in an instant. Maybe there is something out there, that it would be better not to discover. There is no way for us to know. One final thought: maybe we are alone. Right now, we have no evidence that there’s any life besides us. Nothing. The Universe appears to be empty and dead. No ones sending us messages, no one answering our calls. We may be completely alone, trapped on a tiny moist mud ball in an eternal Universe. Does that thought scare you? If it does, you are having the correct emotional reaction. If we let life on this planet die, perhaps there would be no life left in the Universe. Life would be gone, maybe forever. If this is the case, we just have to venture to the stars and become the first Type Three civilization, To keep the delicate flame of life existing, and to spread it until the universe breathes its final breath, and vanishes into oblivion. The universe is too beautiful not to be experienced by someone. This video was made possible by your support. 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92 thoughts on “The Fermi Paradox — Where Are All The Aliens? (1/2)

  1. Kurzgesagt: "Does this thought scare you?"
    Me: "Not at a-"
    Kurzgesagt: "If so, you are having the correct feelings"
    Me: "Oh.."

  2. Most probably what Aliens' definition of "life" is different than ours. They are probably civilised in "another" way. They might also be thinking that there's no other civilisation.

    But the real face might be we're just walking along them not even knowing it.
    They are probably in some other dimension or any other form that we humans can't imagine it, and vice versa.

  3. -indirectly related: Show an airplane to a Viking and an ipad to Lincoln.
    [*1* 0:47 "…theres no way we will EVER know about them…"], [ 2 0:54 "…is pretty much out of our reach FOREVER…"]
    *1. You can know as soon as you experience new information, *2. Nothing is forever ~ propulsion engine is not the only possible traveling method (shown in the video)

    "Ungenauigkeit ist immer ein Umweg." ~ Carl Sternheim

  4. Our universe could just be a locker like how men in black say and all those species are level threes waiting for us to emerge and be like them

  5. So the paradox is basically saying that if other worldly beings with a type 3 civilization,visited the ancient times and a couple of them were to have a conversation, it would go like this:
    "Why did you say we were gods man? "

    "Forget em, we are never gonna see these people again"

    And then flies off to space where they'll never come back.

  6. I guess all the black holes out there are the "remains" of a civilization, that pushed the start button of their the "infinite power source". Schwoop.

  7. Very simple and true answer to this silly question.
    1: The aliens that are intelligent enough to travel around, will see that Earth is not ready/worthy of contact….(Religions, greed, stupidity).
    2: The aliens that are intelligent enough to travel around, and that wants to kill everyone because of resources…will Not come to kill everyone for resources, because space have countless more planets, with more resources, and easier/closer to get.

    Both answer the silly question of why you do not see aliens….And it is that stupidly simple.

  8. I have answer but nobody cares.
    Answer—- actually many alien life exist but we are known to be dormant one. Advanced civilizations have made a treaty to not attack dormant civilizations until it devlops to attain essential technology.
    DORMANT CIVILIZATIONS——+ These are the civilizations which are not able to extract energy and colonise planets of their own solar system.

  9. Its so dumb that people think that we are alone… How can the universe be created if it was to only have just one civilization which is so dumb

  10. This shit is so one-sided and stupid. Instead of addressing any actual problems of the fermi paradox he addresses completely random Hollywood bullshit.

  11. Aliens look at Earth through a past perspective, due to the fact that the time it takes for the light of the present to reach the alien observer would mean that, once they've witnessed it, we'll be long dead. So, observers looking at Earth at the moment from a distant world will be observing the past, rather than the present, so they'd be unaware of the human race

  12. Seriously, why would any civilization want to do any business with us ? If they exist, they probably figured out there are 100 more interesting ways of using their energy than interacting with us. Apparently we need them more than they need us. Do you realize the level of retardation on this planet, we might not even qualify as intelligent species, perhaps other civilizations think there are only animals living here, according to their standards, and human activities are similar to the occupation of cattle. Our planet however is a jewel of such incredible beauty, everywhere you look, from the most simple plain to stunning lansdcapes. Shame our civilization does not mirror its home.

  13. And maybe
    The government just want you to know that we're alone
    If you find a dragon in the forest
    I'm pretty Sure you Wanna keep it For yourself and don't Sell it for some cash

  14. What if the only advanced civilization is in another local group and trying to find a way to get to ours and helps us advance but they cant

  15. Our signals do not even go that much out of our solar system and you decided you know every thing. There is more life under earth then above it. And we know almost nothing about it. We probably dont know anything at all.

  16. 1:15 so for every grain of sand on Earth there are 10k stars in the milky way?

    That math does not work. There are more than 40 billion grains of sand on Earth. Vastly more.

  17. Aliens: Damn, these guys are all kinds of f*cked up. It’s a good thing we got Mr. Rogers out of there and got him his own space condo!

  18. Just a point :
    We can NEVER reach the others local groups, ore maybe 1 or 2 that are the closest to us.
    Why ? Because they escape our reach faster than the speed of light.
    By conventional travel, it will be impossible. But by space distortion (like Alcubiere, and others), maybe ? If it's possible though

  19. Aren't we gravitationally bound to the Virgo cluster? If true, the Hubble flow shouldn't be applicable between us and the Virgo cluster.

  20. Your math is questionable at times over the course of a number of videos…points are on par most of the time, but dude, do the math yourself before including it in videos. 400b stars (ignoring the fact that most scientist say 200b) and you say that's 10,000 for every grain of sand on Earth. That would be 40 million grains of sand on Earth…pretty sure there's a hell of a lot more than that. Like, that's probably on one small beach. When scientist compare grains of sand on Earth to stars it's every star in the universe not the Galaxy.

  21. Or maybe it's because even though the nearest notice board is only on Alpha Centuri, we humans just can't be bothered to take an interest in local events.

  22. how did they figure out the universe is 90 billion lightyears in diameter if we can only see 13.8 billion lightyears in all direction?

  23. Wait, so you mean to tell me there are around 40,000,000‬ grains of sand on Earth? Huh, I thought this number would be way bigger…

  24. It might be cool if in a couple million years humans are the elder race of the galaxy and watching aliens go through their equivalent of the 1950s "It came from outer space" craze in movies.

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