Today’s crocs are iconic semi-aquatic predators, but their extended family tree features lots of land-dwelling cousins. This episode, we take a tour through croc evolutionary history and explore the many times these reptiles have taken to life on dry land. We’ll examine what features these terrestrial crocs shared, which ones they didn’t, and what their fossils tell us about how the shape of crocs has changed over time.

In the news: sauropod guts, Australian biomarkers, butterfly scales, and tropical archosaurs.

Time markers: Intro & Announcements: 00:00:00 News: 00:07:25 Main discussion, Part 1: 00:44:20 Main discussion, Part 2: 01:23:20 Patron question: 02:17:25

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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