Is There Intelligent Life On Other Planets?

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY ↓ More info and sources below ↓ How are we looking and listening for intelligent life? Don’t miss our next video! SUBSCRIBE! ►► http://bit.ly/iotbs_sub Now that we know planets are common in our galaxy, how would we tell if one holds life? Sure, it will take incredibly powerful telescopes and ambitious new space missions, but what are we looking for? What are we listening for? How do we help other worlds know that we are here? Here s the thing: Life on Earth has an expiration date. No matter what humans do, our aging sun will eventually be so hot that we can t survive. If we want to live on, it will have to be beyond Earth. The only question is, will it be US who live on, or just our radio broadcasts and dead satellites? If you missed Part 1 last week: https://www.youtube.com/watch?v=cvET91EYoyc Check out "Five Billion Years of Solitude" by Lee Billings: http://amzn.to/18Tzv59 My Sagan + Valentine s Day episode: https://www.youtube.com/watch?v=TekbxvnvYb8 Ray Bradbury reading "If Only We Had Taller Been" courtesy of NASA/JPL More reading: The 7 hurdles for a planet to develop intelligent life: http://lgmacweb.env.uea.ac.uk/ajw/Reprints/watson_astrobiology_preprint.pdf Sagan s rules for life: http://scienceblog.com/community/older/1999/C/199902379.html Earth is gradually getting more radio quiet: http://www.nytimes.com/2008/03/02/weekinreview/02overbye.html?pagewanted=all&_r=0 Searching for the archaeological ruins of extraterrestrial civilzations: http://www.aeonmagazine.com/nature-and-cosmos/searching-for-the-archaeologicalruins-of-alien-civilisations/ How long will life survive on Earth? http://www.universetoday.com/25367/how-long-will-life-survive-on-earth/ Joe Hanson - Host and writer Joe Nicolosi - Director Amanda Fox - Producer Katie Graham - Director of Photography Andrew Matthews - Editor and Motion Graphics Kate Eads - Production Manager Filmed at Onion Creek Productions in Austin, TX Produced for PBS Digital Studios ----------- Join us on Patreon! https://patreon.com/itsokaytobesmart Twitter http://www.twitter.com/DrJoeHanson http://www.twitter.com/okaytobesmart Instagram http://www.instagram.com/DrJoeHanson http://www.instagram.com/okaytobesmart Merch https://store.dftba.com/collections/its-okay-to-be-smart Facebook https://www.facebook.com/itsokaytobesmartpbs/