Episode 568: Q&A 101: How Do We Know Meteorites Came From Mars? And More... Featuring Dr. Nick Cowan from McGill

In this week's questions show, I explain how scientists know that meteorites came from Mars, is it dangerous to look for alien civilizations, what citizen science projects to get involved in, and more. Featuring Professor Nick Cowan from McGill University. 00:20 How do we know a meteorite came from Mars 02:27 Why look for aliens? 05:20 Observational bias finding big planets? 08:03 What projects can software engineers get involved in? 09:50 Why bother thinking about superhabitable worlds? 11:31 Shouldn't Earth be turned in the wrong direction? 13:00 Can we communicate with gravity waves? 14:19 Would electronics survive a journey of thousands of years? 16:28 Could we set up a system to communicate with Voyagers better? 18:14 What gear setup do we use? 21:13 What will enable deep space travel? 22:57 Habitable zones on a tidally locked planet? Professor Nick Cowan https://msi.mcgill.ca/~cowan/ Want to be part of the questions show? Ask a short question on any video on my channel. I gather a bunch up each week, and answer them here. Our Book is out! https://www.amazon.com/Universe-Today-Ultimate-Viewing-Cosmos/dp/1624145442/ Audio Podcast version: ITunes: https://itunes.apple.com/us/podcast/universe-today-guide-to-space-audio/id794058155?mt=2 RSS: https://www.universetoday.com/audio What Fraser's Watching Playlist: https://www.youtube.com/playlist?list=PLbJ42wpShvmkjd428BcHcCEVWOjv7cJ1G Weekly email newsletter: https://www.universetoday.com/newsletter Weekly Space Hangout: https://www.youtube.com/channel/UC0-KklSGlCiJDwOPdR2EUcg/ Astronomy Cast: https://www.youtube.com/channel/UCUHI67dh9jEO2rvK--MdCSg Support us at: https://www.patreon.com/universetoday More stories at: https://www.universetoday.com/ Twitch: https://twitch.tv/fcain Follow us on Twitter: @universetoday Like us on Facebook: https://www.facebook.com/universetoday Instagram - https://instagram.com/universetoday Team: Fraser Cain - @fcain / [email protected] Karla Thompson - @karlaii / https://www.youtube.com/channel/UCEItkORQYd4Wf0TpgYI_1fw Chad Weber - [email protected] Universe Today Podcast