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b'One hundred episodes is kind of a big deal, so we figured we\\u2019d pick a big deal kind of topic, and it doesn\\u2019t get much bigger than this.\\nAs far as we can tell, all life on Earth is descended from a common ancestry \\u2013 at some point, at least once, life originated on Earth. But when, where, and how? These are open questions that have been subject to lots of scientific and philosophical discussions and experiments. In this episode, we\\u2019ll touch on some of the biggest questions: What even is life? How old is life on Earth? What steps led to the first living things? Is Earth the only place this has happened?\\nIn the news: dino bone disease, amphibian chameleons, ancient social mammals, and pterosaur diets.\\nTime markers: Intro & Announcements: 00:00:00News: 00:08:00Main discussion, Part 1: 00:38:00Main discussion, Part 2: 01:30:00Patron questions: 02:26:30\\nCheck out our blog for bonus info and pictures:http://commondescentpodcast.wordpress.com/\\nSubmit your questions for our End of the Year Q&A using this form: https://forms.gle/2BDWts2RaKzRo3hL8\\nFind merch at the Common Descent Store! http://zazzle.com/common_descent\\nFollow and Support us on: Patreon: https://www.patreon.com/commondescentpodcast Twitter: https://twitter.com/CommonDescentPCFacebook: https://www.facebook.com/commondescentpodcastInstagram: @commondescentpodcast PodBean: https://commondescentpodcast.podbean.com/ iTunes: https://itunes.apple.com/us/podcast/the-common-descent-podcast/id1207586509?mt=2YouTube: https://www.youtube.com/channel/UCePRXHEnZmTGum2r1l2mduw\\nThe Intro and Outro music is \\u201cOn the Origin of Species\\u201d by Protodome. More music like this at http://ocremix.org.\\nMusical Interludes are "Professor Umlaut" by Kevin MacLeod (incompetech.com). Licensed under Creative Commons: By Attribution 3.0http://creativecommons.org/licenses/by/3.0/'