If there is intelligent life out there, why haven't we heard anything yet -- and what form would it take? The answer to that question takes StarTalk Live! guest host Bill Nye the Science Guy, comic co-host Eugene Mirman and their guests comedian Dave Foley and SETI Institute Sr. Astronomer Seth Shostak from Fermi's Paradox to Martian meteorites to NASA's office of Planetary Protection. Along the way, the gang explores the concepts of "Second Genesis" and transpermia and exactly what a radio transmission from intelligent alien life would consist of. (Warning: Since this show was recorded live on 1/24/14 before an adult audience in San Francisco, be prepared for some mildly suggestive language and humor.) Watch Part 4 now: https://www.youtube.com/watch?v=CxeAcT9bx1o Support us on Patreon: https://www.patreon.com/startalkradio Subscribe to StarTalk: null Follow StarTalk: Twitter: http://twitter.com/startalkradio Facebook: https://www.facebook.com/StarTalk Instagram: https://www.instagram.com/startalkradio/ About StarTalk: Science meets pop culture on StarTalk! Astrophysicist & Hayden Planetarium director Neil deGrasse Tyson, his comic co-hosts, guest celebrities & scientists discuss astronomy, physics, and everything else about life in the universe. Keep Looking Up! #StarTalk #BillNye