Just about every body of water on Earth, from oceans to puddles, is home to an ecosystem of tiny drifting organisms. This episode, we discuss what sorts of organisms we might expect to find in a swarm of plankton, we’ll explore how plankton is so fundamental to biological and geological systems on Earth, and we’ll take some time to lay out some of the many ways that ancient plankton are a crucial part of the fossil record. In the news: climbing reptiles, croc extinctions, Ashfall rhinos, and ankylosaur tracks. Time markers: Intro & Announcements: 00:00:00 News: 00:05:40 Main discussion, Part 1: 00:35:15 Main discussion, Part 2: 01:23:00 Patron question: 02:00:30 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 Listen to Will talk speculative evolution on the Nerd Trek Podcast https://open.spotify.com/episode/2NzdG8TMfwGLzpP8sKXHQA And listen to David talk de-extinction on the House of Pod https://open.spotify.com/show/3z6EgP0BzaHQoXzCtxQ32t Support links: ACLU: https://www.aclu.org/ Got a topic you want to hear about? Submit your episode request here: https://commondescentpodcast.com/request-a-topic/ 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

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“What did the council decide on item 42?” — answered with the speaker and the moment.

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