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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  1. I mean if there's a civilization on the edge of the universe, what are the odds we as humanity could survive 45 billion years, long enough for their radio signals to reach us, and not go straight through a planet on the way over here?

  2. About aliens outside the local group and our inability to meet or learn about them
    1. They may already by hyper advanced and on their way here at light speed, it wont take billions of years it could happen tomorrow
    2. If we find a way to travel at light speed we can reach very far away galaxies before they recede; not the farthest but at least midway
    3. They may start doing something like blowing up dozens of stars or coating them in dyson spheres, even a billions years away we will notice that (the fact we cant seem to see that now is either another mystery of the paradox or we lack the technology or equipment to look that far away)
    4. Possoible wormholes (long shot but maybe not impossible)
    5. It may turn out that the increasing rate of expansion of the universe isnt as fast, or may turn around in the distant future or, long shot, a hyper race may be able to do something about it

    Generally speaking we might not have a chance of getting to the edge of the universe and realistically might not even get close but aliens from many distant galaxies have a good shot of being able to contact us increasing the base numbers of the fermi paradox by millions if not billions of galaxies

  3. One thing I have always wondered is why scientist limit looking for life on habitable planets. Is it guaranteed that just because we couldn't live on an unearth-like planet no life can't? Are we certain that our definition of life is the only definition there is? Perhaps there exists life out there that doesn't need water or anything of things that we need.

  4. i believe the great filter is behind us because allready we have technology to move to different planets and live there. but its expensive so thats why we arent doing it. but if necessary we would be able to do so. We could be the leading race on the galaxy at the moment and we could become like gods to other races. maybe we have gotten lucky and no meteorites have destroyed our planet or something like that.

  5. our civilization could one day live on so many other planets that humans on those planets would look different. and hundreds of races would have started with us humans.

  6. 0:25 top right is Zogg from Betelgeuse!
    The reason we haven't found any aliens is because "Squids are stupid" and we are outside the galactic bureaucracy, thus they haven't send a planetary bio-administrator of class 14 or higher yet.

  7. I don’t know, but, you say living things so, bacteria of some type is on other planets, so there is other living things off the earth

  8. I had posted this earlier

    I had asked them..


    They did reply…..



  9. Realizing that ''exist'' it's just a term we invented to things we can see, touch, hear, smell, detect, taste, etc just to prove we are alone or not, but what if there are things in this whole universe that overpass the term ''exist''? That are more than just a ''living'' being with intelligence, this is just awesome

  10. Another obvious one which I think is probably true: Space is just too big, we are too remote, and communication too difficult or impossible. Perhaps it is not really possible to reach type 3. It seems to me that filters will be at different places depending on the type of development. For some planets, they might have nuked each other into oblivion. For others, perhaps an interplanetary war might have exterminated them. For others, an asteroid collision might have done it. Remember in our history, there have been mass extinctions that almost lead to the complete annihilation of all life on Earth. So it is quite possible.

  11. 5:18
    execuse me
    we recieve messages but we are unable to decode them!
    recently chinas giant radio telescope recieved timed radio waves,
    besides that a martian lander also discovered the same thing.
    possibly ,may or may not :
    * aliens exist *
    ** trying to find other aliens **

  12. Or mayby this is 3 level civilation but they are ant-size civilization and we can't see them because they are too small

  13. …and the universe uttered:
    let there be the "arrogantly-stupid" so that the "humbly-sensible" can cherish their awareness
    …and as a result the politicians were borne out of… stupidity arrogance.

  14. What if the universe if a simulation, or like on giant computer program. The superclusters are information, inside are galaxies and within those are stars that each hold varied amounts of information. Black holes are viruses, created from the destruction of that information.

  15. If aliens existed, and knew about other aliens why would they contact beings like us? We havent even figured out whats on the bottom of our oceans or if aliens even exist. We are not that big of a civilization yet and is currently being killed by ourselves in the form of global warming. Why us, when there possibly are other more important civilizations to contact.

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