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Viviparity is the reproductive style where embryos develop inside a parent\u2019s body instead of inside an egg the parent lays. It\u2019s a very familiar habit to us placental mammals, but it\u2019s also an extremely widespread and diverse feature of life. Seriously, it\u2019s ridiculous just how many times viviparity has evolved and just how many different ways species have found to be viviparous. In this episode we\u2019ll answer such questions as: How and why does viviparity evolve? What features vary from one viviparous group to the next? And how do we identify viviparous animals in the fossil record?\nIn the news: army ants, oldest lizards, beaver families, and swimming dinosaurs.\nTime markers:Intro & Announcements: 00:00:00News: 00:04:30Main discussion, Part 1: 00:33:30Main discussion, Part 2: 01:13:30Patron question: 01:46:30\nCheck out our blog for bonus info and pictures:http://commondescentpodcast.wordpress.com/\nThe 2022 End of the Year Q&A Form is LIVE! Submit your question now!https://forms.gle/GTgew75GmVxAKejt6\nFollow this link for a 30-day free trial to Audible!www.audibletrial.com/CommonDescent\nJoin us on Patreon to support the podcast and enjoy bonus content! https://www.patreon.com/commondescentpodcast\xa0\nOr make a one-time donation via PayPal: https://tinyurl.com/4c68u4hp\nFind merch at the Common Descent Store! http://zazzle.com/common_descent\nJoin the Common Descent Discord server! https://discord.gg/CwPBxdh9Ev\nFollow and Support us on:Twitter: https://twitter.com/CommonDescentPCFacebook: https://www.facebook.com/commondescentpodcastInstagram: @commondescentpodcast YouTube: https://www.youtube.com/channel/UCePRXHEnZmTGum2r1l2mduwPodBean: https://commondescentpodcast.podbean.com/ iTunes: https://itunes.apple.com/us/podcast/the-common-descent-podcast/id1207586509?mt=2\nYou can email us at commondescentpodcast(at)gmail.comOr send us physical mail at:The Common Descent Podcast1735 W State of Franklin Rd. Ste 5 #165Johnson City, TN 37604\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/