Episode 232 - Vertebrate Origins

The Common Descent Podcast

Common Descent

Science, Natural Sciences, Education, Earth Sciences, Science:natural Sciences

4.8 • 764 Ratings

🗓️ 7 December 2025

⏱️ 136 minutes

🔗️ Recording | iTunes | RSS

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Summary

Today, bony animals are some of the most diverse organisms on Earth, but it wasn’t always that way. This episode, we explore what features distinguish vertebrates from their closest relatives, and we dive into the abundant evidence from genetics, embryology, and the fossil record that gives us a glimpse at how our distant ancestors came to be. In the news: swimming hands, early life, Dunkleosteus jaws, and Neanderthal noses Time markers:Intro & Announcements: 00:00:00News: 00:05:35Main discussion, Part 1: 00:42:55 Main discussion, Part 2: 01:21:55Patron question: 02:05:55 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/ 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

Transcript

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0:00.0	You're listening to the Common Descent Podcast.
0:19.0	Hello, Will. Hello, David.
0:21.5	Hello, everybody, and welcome to Common Descent, a podcast about paleontology, evolution,
0:25.9	and the history of life on Earth.
0:27.9	This is episode 232, the second to last episode of 2025.
0:34.9	This episode, we are tackling the subject of vertebrate origins.
0:40.1	Yeah.
0:41.3	We will investigate the evolutionary beginnings of our big family tree, vertebrate animals,
0:48.7	animals with bones, kind of.
0:51.3	Yeah.
0:51.9	We will explore who belongs in this group, who our close relatives are, and what we know
0:58.3	from modern animals and fossils of how vertebrate organisms got started.
1:04.2	It's going to be a lot of fun.
1:05.2	We'll touch on a bunch of really famous fossil sites and fossils themselves in this discussion.
1:10.5	This is another one of those exciting topics of we talk about vertebrates all the time.
1:15.8	That's kind of, that's like what the podcast is about.
1:18.4	Yeah, exactly.
1:19.9	Now let's actually talk about what we've been talking about.
1:23.7	Yes, this episode is also going to go very nicely alongside the Bones episode, episode 210, and the teeth episode, episode 88.
1:33.2	Also, a little bit of a spoiler for something we'll talk a little bit about.
1:37.6	It'll also go very nicely alongside the brains episode, episode 121.
1:42.2	And tales, for that matter, 150.
	...

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