Episode 85 – The Ordovician Mass Extinction

The Common Descent Podcast

Common Descent

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

4.8 • 764 Ratings

🗓️ 19 April 2020

⏱️ 113 minutes

🔗️ Recording | iTunes | RSS

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Summary

We’ve discussed mass extinctions quite a bit on this podcast, and indeed we’ve devoted episode to four out of the famous “Big Five” that shaped life on Earth. This episode, we’re completing the set with the Ordovician mass extinction, the earliest of the five. As usual, we’ll explore what happened, who it happened to, why it happened, and how it left its mark on life on Earth. In the news: ocean crocs, early archosaurs, ancient humans, and post-extinction lakes. Time markers: Intro & Announcements: 00:00:00News: 00:05:00 Main discussion, Part 1: 00:30:30 Main discussion, Part 2: 01:01:00Patron question: 01:46:00 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.
0:19.0	Hello, Will. Hello, David.
0:21.5	Hello, listeners, and welcome to episode 85 of the Common Descent podcast.
0:26.7	Wait, this one ends in a five.
0:27.7	It does end in a five, and you know what that means.
0:30.4	The next one ends in a six.
0:32.5	This one is an extinction episode.
0:34.7	Yes.
0:35.5	So we have this tradition where episodes that end in five are extinction episodes.
0:39.4	This time we are talking about the oldest of the famed Big Five Phanerozoic mass extinctions,
0:47.9	the Ordovician mass extinction.
0:50.4	And the final of the Big Five that we've talked about.
0:53.1	This is it.
0:53.7	We did, we've done the other four of the big five. We've done a bunch of other
0:57.7	extinction topics. So following in the same trajectory as those, we will talk about what the
1:03.9	extinction was, what suffered, what probably or maybe happened to cause it, and the legacy that it left behind.
1:13.5	The aftermath.
1:14.4	The aftermath.
1:15.0	That is the last section on my notes.
1:16.5	It is called Aftermath.
1:18.1	This episode was requested by Rita, one of our patrons, by Lleweli, and way back in our March 2018 survey, some anonymous person requested that we do
1:32.9	all the big five.
	...

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