Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACE Are aliens watching Earth TV? We'd like to credit the SKA Organization for the image used in the thumbnail. Support us on Patreon! https://www.patreon.com/pbsspacetime Get your own Space Time t­shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Help tranlate our videos! null Sources and further reading: The Square Kilometer Array https://www.skatelescope.org/ Eavesdropping on Radio Broadcasts from Galactic Civilizations with Upcoming Observatories for Redshifted 21cm Radiation Loeb & Zaldarriaga 2007, Journal of Cosmology and Astroparticle Physics, 1, 20 https://arxiv.org/pdf/astro-ph/0610377v2.pdf Costs and Difficulties of Large-Scale 'Messaging', and the Need for International Debate on Potential Risks Billingham & Bedford 2011 https://arxiv.org/abs/1102.1938 Previous Episode: https://www.youtube.com/watch?v=v3hd3AI2CAA Written and hosted by Matt O’Dowd Produced by Rusty Ward Graphics by Grayson Blackmon Made by Kornhaber Brown (www.kornhaberbrown.com) Comments Answered by Matt: Luca$sino https://www.youtube.com/watch?v=mht-1c4wc0Q Douglas Oak https://www.youtube.com/watch?v=mht-1c4wc0Q Grin Reaper Of Trolls https://www.youtube.com/watch?v=mht-1c4wc0Q viermidebutura3 https://www.youtube.com/watch?v=mht-1c4wc0Q Cornerrecord https://www.youtube.com/watch?v=mht-1c4wc0Q Special thanks to our Patreon Big Bang, Hypernova and Quasar Supporters: Henry Van Styn Antonio Park Joel Brinton Luna IT Solutions Clock Watcher Joe Ratfeast Vitaly Kovalenko John Hofmann Thanks to our Patreon Gamma Ray Burst Supporters: Jade Bilkey Kevin Warne JJ Bagnell J Rejc Bernardo Higuera Michael Fischer Dylan Merida Colette Weeks Amy Jie Anthony Caridi Avi Goldfinger Corey Smeaton John Pettit Shannan Catalano Florian Stinglmayr Yubo Du Benoit Pagé-Guitard Ronny Polonia Nathan Leniz Jessica Fraley Kirk Mathews Loro Lukic Carl P. Corliss Brandon labonte David Crane Greg Weiss David Matteson Marc Lagarde Eric Jackson Will and Sonja Marple