Why Haven't We Found Alien Life?

Seems like Aliens SHOULD Be Out There!

Sign Up on Patreon to get access to the Space Time Discord!
https://www.patreon.com/pbsspacetime

Sign up for the mailing list to get episode notifications and hear special announcements!
https://mailchi.mp/1a6eb8f2717d/spacetime

Check out the Space Time Merch Store
https://pbsspacetime.com/

Help translate our videos! http://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7g

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!

Is It Irrational to Believe in Aliens
https://www.youtube.com/watch?v=XAU9ofjcx-Y

5 Real Possibilities for Interstellar Travel
https://www.youtube.com/watch?v=EzZGPCyrpSU

Comments:
_______________________
Ray Vertti
https://www.youtube.com/watch?v=94ed4v_T6YM&lc=z131v34x5njqx1tu223ifh5g0lf3ipehj04

Eric Vilas
https://www.youtube.com/watch?v=94ed4v_T6YM&lc=z13wxnwbmpu1xxad4223dzdzanq3tjmbn04

solution 99x
https://www.youtube.com/watch?v=94ed4v_T6YM&lc=z13kwngxlpnox3chw04chnfzjlraztlast00k

SirNate
https://www.youtube.com/watch?v=94ed4v_T6YM&lc=z13kwngxlpnox3chw04chnfzjlraztlast00k
References:
_______________________
On The History and Future of Cosmic Planet Formation
Behroozi & Peeples 2015, http://arxiv.org/abs/1508.01202
http://www.nasa.gov/feature/goddard/most-earth-like-worlds-have-yet-to-be-born-according-to-theoretical-study

Potentially biogenic carbon preserved in a 4.1 billion-year-old zircon
Bell et al. 2015
http://www.pnas.org/content/early/2015/10/14/1517557112.abstract

Видео Why Haven't We Found Alien Life? канала PBS Space Time