Episode 82 - Trilobites

The Common Descent Podcast

Common Descent

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

4.8 • 764 Ratings

🗓️ 8 March 2020

⏱️ 118 minutes

🔗️ Recording | iTunes | RSS

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Summary

Few fossil animals are as popular with the public, as abundant in the fossil record, or as important to the study of past life on Earth as trilobites. These ocean-dwelling arthropods came in an amazing variety of shapes, sizes, and lifestyles, with many thousands of identified species, and they persisted on our planet for more than 270 million years. And best of all, they left behind an incredible fossil record giving us insights into their evolution, life history, and ultimate extinction. In the news: evolution of gliders, a weird worm, tiny marsupial lions, and dino DNA? Time markers: Intro & Announcements: 00:00:00News: 00:05:00Main discussion, Part 1: 00:36:30 Main discussion, Part 2: 01:10:30Patron question: 01:51:30 Check out our blog for bonus info and pictures:http://commondescentpodcast.wordpress.com/ The Common Descent Store is open! Get merch! http://zazzle.com/common_descent Follow and Support us on: Patreon: https://www.patreon.com/commondescentpodcast Twitter: https://twitter.com/CommonDescentPCFacebook: https://www.facebook.com/commondescentpodcastInstagram: @commondescentpodcast PodBean: https://commondescentpodcast.podbean.com/ iTunes: https://itunes.apple.com/us/podcast/the-common-descent-podcast/id1207586509?mt=2YouTube: https://www.youtube.com/channel/UCePRXHEnZmTGum2r1l2mduw 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 3.0http://creativecommons.org/licenses/by/3.0/

Transcript

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0:00.0	You're listening to the Common Descent Podcast.
0:19.5	Hello, Will. Hello, David. Hello, Will.
0:21.3	Hello, David.
0:22.2	Hello, listeners.
0:23.3	Welcome to episode 82 of Common Descent.
0:27.1	This episode, Trilobites.
0:29.3	About time.
0:30.4	Right?
0:31.0	Well, you don't want to rush something like trilobites.
0:33.1	No.
0:33.6	This is something you savor.
0:35.4	Yeah, you let it age.
0:38.0	If you are unfamiliar, Trilobites are some of the most famous fossils of all time.
0:44.2	They're almost always in a picture if we're talking about the history of the world or something.
0:48.0	Trilobites are extinct arthropods, so they are animals with exoskeletons in the same giant group as crabs and centipedes and insects and spiders and scorpions and such.
0:59.8	They are entirely extinct.
1:02.0	They are some of the most common and most diverse extinct organisms.
1:05.8	They are super famous.
1:07.4	You know, most of the time invertebrates in the fossil record, the famous ones are
1:12.5	usually famous for an invertebrate group. Yeah, no. Like Euryptorids, the sea scorpions,
1:19.4	are famous for an invertebrate. But if you just... The griffin flies of the carboniferous.
1:25.0	But there's not a lot of t-shirts. Right. It's hard for invertebrates to rise up to, like, dinosaur levels or even, you know, ice-age mammal levels.
	...

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