Episode 48 - Sharks

The Common Descent Podcast

Common Descent

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

4.8 • 764 Ratings

🗓️ 18 November 2018

⏱️ 92 minutes

🔗️ Recording | iTunes | RSS

🧾️ Download transcript

Summary

This episode, it’s back into the ocean, this time to discuss one of the most successful groups of predators on the planet. Sharks are famously “ancient,” but their evolutionary story is complex and fascinating, stretching back more than 400 million years, from their assorted bizarre ancestors to the incredible diversity we see today. In the news: nocturnal elephant birds, hadrosaur sounds, prehistoric protein preservation, and colorful dino eggs. Time markers: Intro & Announcements: 00:00:00News: 00:03:30Main discussion, Part 1: 00:31:00Main discussion, Part 2: 00:58:30 Check out our blog for bonus info and pictures: http://commondescentpodcast.wordpress.com/ Don't forget to submit your question for our End of the Year Q&A:https://docs.google.com/forms/d/e/1FAIpQLSeZjgAw5vghNPOYJ7e1rKJnqMA-QUn2WgYjM5F4Oj336O49gQ/viewform?usp=sf_link Follow and Support us on: Patreon: https://www.patreon.com/commondescentpodcast Twitter: https://twitter.com/CommonDescentPCFacebook: https://www.facebook.com/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. Muscial 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, David. Hello, Will. And hello listeners. Welcome to episode 48 of the Commerston
0:27.7	podcast. Today we are talking about a very popular group. It's been quite requested. And as you might have been guessing we'd get to
0:42.0	today we are talking about sharks do do do do do do do do we are going to talk about the
0:49.7	evolution of sharks today no small matter to discuss no there's a lot of sharks we. No small matter to discuss. No, there's a lot of sharks. We'll get into that.
0:57.9	There's a lot of them and they've been around for a long time and yet and they were weird.
1:03.9	This episode was requested by a number of listeners. Lydia, Amanda and Jonathan all made requests at one time or another for us to talk
1:14.5	about sharks, and so we shall.
1:18.3	For today's episode, what we're going to focus on is how we got to modern sharks.
1:23.2	You know, what we see through the transition of the fossil record, we're not going to be able to focus on every group because there's nine current major groups of sharks today.
1:36.3	Like I know we always say, this could be multiple episodes.
1:39.2	Each one of those really could be a different episode.
1:41.4	They're all very different.
1:42.8	They're all, they all have long
1:44.7	histories going back to, you know, some before and some to the time of the dinosaurs. Like,
1:51.2	these have long, long histories that we can talk about. So we are going to get a very, a very good
1:58.7	overview of what sharks were doing up until they became the sharks we
2:03.3	know. Before we get into the episode, some quick announcements for you. Very quick. As long-time
2:09.4	listeners already know, our podcast is heavily, and in fact, entirely funded by our lovely patrons.
2:16.8	And if you join Patreon at a certain level, we will
2:20.7	shout your name out on the podcast. And so I shall, welcome to the Patreon, John. Thanks for
2:28.7	your contribution. Thanks for hopping on. Yeah. Now on a side note to listener participation, we are asking not just for money, but your questions.
	...

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