Among the most spectacular of animal behaviors is migration, the habit of many species to undertake massive journeys, sometimes traveling thousands of kilometers to access food or breeding grounds. This episode, we explore the incredible diversity of migratory behaviors, we examine the functions and adaptations that make migration happen, we discuss how migration is defined, and we investigate some of the tools we can use to identify migration in the distant past. In the news: giant crabs, fossil forests, early cephalopods, and mating termites. Time markers:Intro & Announcements: 00:00:00News: 00:04:40Main discussion, Part 1: 00:30:15Main discussion, Part 2: 01:26:00Patron question: 01:49:35 Check out our website for this episode’s blog post and more: http://commondescentpodcast.com/ Join us on Patreon to support the podcast and enjoy bonus content: https://www.patreon.com/commondescentpodcast Got a topic you want to hear about? Submit your episode request here: https://commondescentpodcast.com/request-a-topic/ We’re an Audible Affiliate Partner! Use this link for a 30-day free trial to Audible: https://www.audibletrial.com/CommonDescent Lots more ways to connect with us: https://linktr.ee/common_descent The Intro and Outro music is “On the Origin of Species” by Protodome. More music like this at http://ocremix.org. Musical Interludes are "Professor Umlaut" by Kevin MacLeod (incompetech.com). Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.org/licenses/by/3.0/