Episode 172 - Toothed Whales

The Common Descent Podcast

Common Descent

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

4.8 • 764 Ratings

🗓️ 20 August 2023

⏱️ 154 minutes

🔗️ Recording | iTunes | RSS

🧾️ Download transcript

Summary

For much of their evolutionary history, whales have been divided into two main lineages: baleen whales and toothed whales. The toothed variety are especially diverse today, including sperm whales, belugas, porpoises, and so, so many dolphins (among others). This episode, we explore what makes toothed whales distinct – besides the obvious – and what the whale fossil record tells us about how they came to be among the most successful marine animals in Earth history. In the news: leaf-eating birds, tiny whales, whale-like reptiles, and giant whales. Time markers:Intro & Announcements: 00:00:00News: 00:07:25Main discussion, Part 1: 00:42:45Main discussion, Part 2: 01:24:15Patron question: 02:23:45 Check out our blog for bonus info and pictures: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/ We’re an Audible Affiliate Partner! Use this link for a 30-day free trial to Audible: https://www.audibletrial.com/CommonDescent Or make a one-time donation via PayPal: https://tinyurl.com/4c68u4hp Find merch at the Common Descent Store! http://zazzle.com/common_descent Join the Common Descent Discord server! https://discord.gg/CwPBxdh9Ev Follow and Support us on:Twitter: https://twitter.com/CommonDescentPCFacebook: https://www.facebook.com/commondescentpodcastInstagram: https://www.instagram.com/commondescentpodcast/YouTube: https://www.youtube.com/channel/UCePRXHEnZmTGum2r1l2mduwPodBean: https://commondescentpodcast.podbean.com/ You can email us at commondescentpodcast(at)gmail.comOr send us physical mail at:The Common Descent Podcast1735 W State of Franklin Rd. Ste 5 #165Johnson City, TN 37604 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.
0:18.8	Hello, David. Hello, Will.
0:21.1	And hello, listeners.
0:22.8	Welcome to episode 172 of the Common Descent podcast.
0:27.8	Today's episode, we are discussing toothed whales.
0:31.2	Whales that are toothed.
0:32.3	Yes, or scientifically known theodontocytes.
0:35.1	Which means toothed whales.
0:36.3	Mm-hmm.
0:36.6	It's very consistent.
0:37.4	It is. So this is the groupontocytes. Which means toothed whales. Mm-hmm. It's very consistent.
0:37.9	It is.
0:47.1	So this is the group that includes dolphins, orcas, the sperm whale, all your whales that aren't filter feeding, basically.
0:47.3	Right.
0:48.7	Not the, not the baleen whales. Mm-hmm.
0:49.2	Not your blue whales and right whales and humpback whales, the other guys.
0:53.0	Yes.
0:53.7	Dolphins are toothed whales.
0:55.8	We will be talking about this extremely diverse, extremely weird group, and going through
1:02.2	what sets them apart from their, you know, traditionally thought of whale ancestors, their big
1:07.6	filter feeding cousins, what defines each type of toothed whale and what is
1:12.8	their fossil record look like. This will be a slightly different episode since we're kind of
	...

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