Why Haven't We Found Alien Life? | Space Time | PBS Digital Studios

Seems like Aliens SHOULD Be Out There! Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Support us on Patreon! http://www.patreon.com/pbsspacetime 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