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! null 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 Eric Vilas https://www.youtube.com/watch?v=94ed4v_T6YM solution 99x https://www.youtube.com/watch?v=94ed4v_T6YM SirNate https://www.youtube.com/watch?v=94ed4v_T6YM 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