Astronomy Cast Ep. 433: Volcanoes on Mars

https://www.youtube.com/watch?v=KZLCzSmZyvQ Streamed live December 30, 2016. Mars is a world of extremes. This unassuming red world is home to the largest and tallest volcanoes in the entire solar system. In fact, it's not even a close contest, with Olympus Mons rising 22 kilometers above the surrounding plains. More than twice as tall as Mount Everest. How did Mars get such big volcanoes? And how active is the planet today? Do go visit http://astrogear.spreadshirt.com/ for cool Astronomy Cast and CosmoQuest t-shirts, coffee mugs and other awesomeness! http://cosmoquest.org/Donate This show is made possible through your donations. Thank you! (Haven't donated? It's not too late! Just click!) The 365 Days of Astronomy Podcast is produced by Astrosphere New Media. http://www.astrosphere.org/ Visit us on the web at 365DaysOfAstronomy.org or email us at info@365DaysOfAstronomy.org. While you're at it, do support our Learning Space educator training program by going to this site: https://www.patreon.com/LearningSpace Please help us keep training the trainers! Learning Space is a weekly G+ Hangout on Air about topics in astronomy education, outreach and other ways to share science both in the school setting and outside it. We bring you interviews, hands-on demonstrations, lists of our favorite educational resources and more!