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. It takes at least 200 hours to make one of our videos, and thanks to your contributions on Patreon, we are slowly able to do more and more of them. If you want to help us out, and get your own personal bird for example, check out the Patreon page.

Dereck Turner

100 thoughts on “The Fermi Paradox — Where Are All The Aliens? (1/2)

  1. Kurzgesagt – In a Nutshell says:

    There's brand new stuff in the Kurzgesagt Merch Shop. Check it out here:

  2. Erezan says:

    Or maybe the religion are true and the end is close for us

  3. chu bomber says:

    Anyonee notice the magnemite being one of the aliens

  4. Nick Serrano says:

    0:29 I wanna visit planet Magnemite

  5. Mario Valdeolivar says:

    4:56 Gurren-Lagann lmao

  6. Neko Destra says:

    Me at 0:45 : Andromeda is rushing towards the milky way tho

  7. AI Johan Gerrison Bot says:

    Where are all the aliens at? Well, believe it or not, but there's one now in front of you… 👽

  8. grandadmiralthrawn92 says:

    4:59 I'm getting a lot of Mass Effect vibes here.

  9. LEO_ EM says:

    What if God is type three civilization and created us

  10. arzus4 says:

    A pity they don't broadcast videos likes this one in the radio waves from Earth but 90s soap operas and Trump's speaches instead. This one deserves to travel out and tell the aliens what we think of them. Even if it might give someone out there a good laugh.

  11. Karpuz Kavun says:


  12. Bruno Vásquez says:

    4:13 One vision, one purpose, in the name of Kane

  13. Joe McDonald says:

    Does this mean that the capsule thing we sent out 25 or something years ago into space will never be found ?

  14. Uganda Luigi Uvuemubuen Osás says:


  15. Mecha Spider says:

    The council of the ancients watching this video:
    -Sir, they're getting aware, we should kill them.
    -No, I want to see how much they know.
    -But sir
    -Silence, the council has decided to be this way.

  16. Radbiker33357 says:

    Commencing existential crisis in


  17. Nico says:

    Imagine Megatron is out there somewhere…

  18. ReJay YT says:

    magnemite in top panel 0:23

  19. malawiglenn says:

    there are not more stars in our galaxy than grain of sands on Earth.

  20. ‭‭アキュララ says:

    4:49 humanity begins

  21. Michael Tornell says:

    I appreciate the fact that the most negative situation, we might really be alone, was mentioned. Being a "Glass Half Full" Person, I still am ready to yield to the possible utter truth.

  22. Cary O Phil Len says:

    if there were other life forms we would have noticed by now.. oh WOW. Humanity can hardly see the nose of it's own face.

  23. Cary O Phil Len says:

    Do you live in an area where there's that one nutty family who are always smashing their own stuff up, have cars that are all dented up, keep getting drunk and fighting eachother. If you do i'm sure you just keep your distance…. or nip round to the edge of your block to have a laugh at them.
    Humanity is that family…. Why would any other intelligent life ring the bell.

  24. FlamingAshe says:

    magnemite pokemon

  25. Ali Emre SÖZER says:

    Is it possible to convert our earth or the moon to a spaceship? ( While the life remains still) Maybe with a tiny star acts as the sun

  26. Joseph says:

    Me: Comes for a cool interesting video about aliens and space

    Me: Leaves with a existential crisis

  27. Pxd says:

    4:00 (bottom right) hehe

  28. NameYourChannel says:

    Well this is all just assumption.. someone's idea of what MIGHT be.
    That's the problem with assuming evolution is true. That theory is all based on assumptions and falls apart when they are taken out of the theory.
    God said Eve is the mother of ALL living. He even placed earth in the centre of our universe (cosmic background radiation we've detected shows us this.)
    The only "aliens" we ever experience here from earth are fallen angels.
    Far more evidence for God's Bible than thete is for this evolution fairytale.

  29. Dakota170 39 says:

    Hello je suis français et j'adore tes vidéos, vive les sous titres !

  30. aidan saikia says:

    2:20 vulcanoes????

  31. Ahmad Rahim Khan says:

    What if!? 🤔 we get to type 3 and create wormholes instead of fast spaceships 🚀

  32. LMivha says:

    I just had a very serious thought. What if there was life on near by planets. I mean think about it. But the government didn’t want us to know because of certain reasons which you could probably guess. I mean we wouldn’t know even if there was. There’s definitely life, there’s not even a doubt, but my theory about the government is probably unlikely idk

  33. Jax Paradize says:

    Not alone.

  34. Infinite Battlefield says:

    Anyone notice how that spaceship was from that anime that I forgot the name of?

  35. Adam Crow says:

    400 billion is Enough stars for 10,000 per grain of sand on earth? The Earth has roughly 7 quintillion 500 quadrillion grains of sand. Maybe my math is fuzzy or something? Those don't seem to add up. Definitely going to have to fact-check these from now on!

  36. Mustafa Italia says:

    AREA 51:Am I a JoKe To YoU

  37. Syn's Project says:

    "One-thousand-billion"? You… mean "One-trillion"…..?

  38. egemen says:

    0:28 look middle up

    *Happy clemont noises*

  39. I J says:

    I’m betting that life is pretty common , but advanced life is similar to us so infighting keeps it from doing anything significant.

  40. 1337thegamer420 says:

    notices the NOD symbol

    Ah, you must be a man of culture, as well.

  41. De Fool says:

    I see plenty of evidence in UFOS

  42. Dillon Jamison says:

    Videos like this make me feel like nothing

  43. B S says:

    0:17 Top right

    Don’t hug me I’m scared 4 anyone?

  44. twostroke riders says:

    "The universe is to beautiful not to be experienced by someone" thank you

  45. Diogo portel silva says:

    nothing is infinite

  46. VXmaster100 says:

    Love the Sidonia reference

  47. Peter Chang says:

    What about UFOs that the CIA legitimately acknowledged as real back in 2017?

  48. mjolnir says:

    Maybe the universe was less habitable when it was younger. Maybe the ratio of suitable planets is lower than we think. Maybe we have been very lucky with the "filters".
    Maybe its less common that evolution favors high intelligence than we know.

  49. Winged Gecko says:

    Haha good joke very optimistic of you

  50. Prek no preguntes por qué mi nombre es largo says:

    I wonder if there's aliens wondering about if there's aliens wondering about them, like me right now

  51. SuperSoapGaming {unable to make videos} says:

    i have a possible answer
    when life dies on 1 planet it spreads into 2 living planets
    if that's true then we are the first

  52. Ant Bar says:

    Well yea because reality is dumb

  53. Lia Johnson says:

    hey who wants sum pizza 😁

  54. nexuspal says:

    if a ship goes faster than light, does that mean it goes back in time?

  55. q re says:

    Whoever is white is an alien

  56. Revive Toxicity says:

    Spelled volcanoes wrong

  57. Changis Khan says:

    I thought the universe was infinitely big

  58. renato reales says:

    My own theory is that, we are alone in the universe.Cause god created only the universe and us. The end.

  59. Gorthan300 says:

    1:00 is this a Knight of Sidonia reference?

  60. GAMER GUY says:

    0:27 any pokefans out here?

  61. HIGH says:

    climate change will be the end of us

  62. Joshua Polanco says:

    GalacDuck is awesome! But since it’s in the video, does that mean that it’s the last surviving being from the previous universe? Where are the Heralds? Just questions upon questions now.

  63. Sabb Dios says:

    So if the great filter is a advanced civilization they are pretty much like the reapers. Not letting other civilizations get advanced

  64. Kainui Penaloza says:

    If the only other life was hostile, it would kill itself, there fore we would be seen as an ally, not threat. After some analysis of us of course. They'd be sentient, and eventually we could find away to communicate, everyone relates aliens with doom, but if we, a sentient clorabative species found new life, we wouldn't kill it. We would try to befriend and study it.

  65. GH0ST6 says:

    Awww cmon I’m getting bored I want an alien to come to our planet and they’re like nice lol

  66. the pink slobe says:

    is that magnemite at the bottem 0:02

  67. Makario Santiaguero Jaramillo says:

    we are alone plain and simple

  68. 한지웅 says:

    4:41 Zerg overload

  69. Always In Incognito says:

    These aliens are campers they hide and hide and then headshot you while looting other planets

  70. Nickie B says:

    They think anyway right

  71. Hanios Haienl says:

    In the first part of the video… I saw a pokemon

  72. Christopher Pacheco says:

    "The universe is too beautiful not to be experienced by someone"
    I felt that

  73. Victor Ceballos says:

    More importantly, WAS THAT A MAGNEMITE AT the beginning?!!

  74. Nizal Muhammad says:

    0:58 those ship very like a sidonia

  75. Galaxy Stuff666 says:

    the thought that we are alone in the universe scares me, but the idea of other life scares me more

  76. The Assistant says:

    when a video starts off with something so grossly incorrect such as the statement that there is roughly ten thousand stars for every grain of sand on our planet, makes the rest of everything you say completely suspect. But thank you again for trying to pollute us with your inaccuracies and b.s…

  77. Sleepy Savior says:

    You forgot another theory. That life does exist all over, but communication and travel between its sources isnt actually possible.

    For all we know we could be getting signals from other civilizations constantly, but from so far away the signals become too weak to be detected past the Background radiation of the universe.

    And that travel between stars isnt possible, or would take so many generations the travel isnt worth trying. We can't even make technology that can last in continuous operation for one generation reliably, let alone a ship capable of making a thousand year journey with limited replacement parts.

    That's actually the most likely scenario. That life is everywhere but the distance between is too great to conquer. That the theories about travel between the stars are all not actually viable.

  78. Harith - Kun says:

    That's Magnemite.

  79. Kenji Campos says:

    Amazing musical setting

  80. xele fonte says:

    It wouldn’t surprise me if there is absolutely no other life in the universe and if there is a God…God made the universe so extensive to mess with us. It wouldn’t surprise me at all if God is the biggest troll of all leaving humanity to wonder why the universe is so big when God specifically designed it like the storage capacity of grandma’s new computer… 1000 GBs and only 1 GB used…

  81. Siu Lung Lui says:

    imagine all of this are all true. people are still suspecting others and without caring about the fact that we might be the first life in this universe = =

  82. JA Freeman says:

    This video made me rethink life

  83. PancakeBoie says:

    Random theory;

    We are Area 51 and Area 51 is our escape

  84. ItzSensei says:

    Everybody act all gangster til galacduc does what he can to survive

  85. WizardCat says:

    1:00 knights of Sidonia reference I see

  86. witty name says:

    5:40 haha sounds like dark souls lore

  87. Ansharul Hakim says:

    But what if they are 4th or more dimensional creature, so we can't see them cause we're still in 3rd dimensionional

  88. kunさんのコメ欄返信bot_じんばぶえ_ says:


  89. Ryk Son says:

    The process is God you idiots!!

  90. ClAsH OnNeR says:

    0:25 oh wait!! Its a magnemite!!

  91. Lucas Guan says:

    What If every galaxies contain only 1 habitable planet?

  92. Lil’saprel gaming says:

    All hail galduck

  93. Lil’saprel gaming says:

    We shall pray to Galduck and hope for our freedom

  94. Lil’saprel gaming says:

    5:40 oh sh** everybody build bunkers

  95. William Connolly says:

    knights of sidonia, good stuff @ 1:00

  96. dangsam says:

    Why do you think a civilization that can conquer the galaxy cannot escape our observations?

  97. Jordan Pool says:

    I love the insane amount of random references in these videos. Haha the space ship at 1:05 is from Knights of Sidonia.

  98. Nate Creed says:

    Maybe we are the last species to exist after a wipeout of species

  99. Musta Krackish says:

    is there 400 billion grains of sand

  100. Swan InaBOX says:

    I can't help thinking, even if we made a ship that could catch up to the rest of the Universe, it would speed up…

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