Extraterrestrial Life

The Fermi Paradox Asks Where All The Aliens Are

We need to talk about the aliens. More specifically, where are they hiding? The Fermi paradox poses the question: if the universe is so big and old, and there are countless opportunities for life, why have we not found aliens? The paradox is named after physicist Enrico Fermi, who first proposed the concept in 1950.

The paradox is the contradiction of the likelihood of extraterrestrial life and the lack of evidence for it. The chance that aliens exist is so large, but we haven't the slightest bit of evidence that they're here. How is that possible? Several scientists have proposed solutions to the paradox, such as the possibility that Earth-like planets capable of supporting life are much rarer than we think, or that aliens do exist, but they choose to remain silent for their own safety. Check out the videos below to learn where the aliens are. Just kidding—wish we knew! The videos below will give you a sobering look at how insanely huge our universe is, and how likely it is that aliens are indeed out there. Come out, come out, wherever you are, aliens...

Do Aliens Exist?

They're almost certainly out there.... but where?!

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Why Haven't Aliens Found Us Yet?

There is a very high probability that the universe contains other life. So why haven't we seen evidence for it?

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Key Facts In This Video

  1. The Fermi paradox speaks to the contradiction between the likelihood of alien life and the lack of evidence for it. 00:31

  2. One potential explanation for the Fermi paradox is that aliens do exist, but have remained silent to better protect themselves from hostile life forms. 02:25

  3. NASA's James Webb Space Telescope will be more powerful than the Hubble, opening up new possibilities in the search for extraterrestrial life. 03:24

The Fermi Paradox, Part II

In part two of Kurzgesagt's deep dive, explore possible solutions to the Fermi Paradox.

The Fermi Paradox, Part I

Where are all the aliens? Delve into the basics of the Fermi Paradox in this two-part video from Kurzgesagt.

Written by Curiosity Staff January 22, 2015

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