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PBS Space Time
Why Haven't We Found Alien Life?
Season 2
Episode 7
With millions of Earth like planets around sun like stars in our galaxy alone, why don't we see intelligent alien life? Or any other life for that matter? It gets especially weird when you factor in new scientific revelations that life on Earth occurred crazy fast! So if you want to help us theorize on the real reasons we haven't found alien life, you should watch today's episode of Space Time!
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18:26
Learn about Nobel laureate Roger Penrose's idea of how consciousness is caused by quantum processes.

16:28
Faster than light travel may produce gravitational waves that we could see here on Earth.

20:07
All particles belong to two large groups: fermions and bosons.

16:11
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17:25
So you’ve decided to jump into a black hole...

12:51
We only recently figured out where cosmic rays are coming from.

13:28
Black hole complementarity may force us to rethink what it means to say that it exists.

20:15
To travel the stars without faster than light travel we’re going to need a generation ship.

16:19
Today we are jumping into a black hole. Again.

15:36
The Moon: humanity’s first destination beyond our atmosphere.

15:07
So how did humans figure out the solar system? Eclipses!

15:02
Is gravity just an emergent effect of entropy?