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b'When scientists find a new rock formation or fossil assemblage, how do they determine how old it is? The answer lies in the many varied methods of geologic dating. In this episode, we\\u2019ll discuss how we can sort the events in Earth history, how we calculate specific ages for ancient materials \\u2013 including a deep-dive into radiometric dating! \\u2013 and most importantly, how these many techniques support and complement each other.\\nIn the news: gaze following, polar pterosaurs, pachycephalosaur heads, and giant marsupials.\\nTime markers:Intro & Announcements: 00:00:00News: 00:06:50Main discussion, Part 1: 00:38:45Main discussion, Part 2: 01:31:10Patron question: 02:20:18\\nCheck out our blog for bonus info and pictures:http://commondescentpodcast.com/\\nTrans Lifeline connects trans people to community support and resources:https://translifeline.org/\\nJoin us on Patreon to support the podcast and enjoy bonus content! https://www.patreon.com/commondescentpodcast\\nWe\\u2019re an Audible Affiliate Partner! Use this link for a 30-day free trial to Audible: https://www.audibletrial.com/CommonDescent\\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: https://www.instagram.com/commondescentpodcast/ YouTube: https://www.youtube.com/channel/UCePRXHEnZmTGum2r1l2mduwPodBean: https://commondescentpodcast.podbean.com/\\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/'