Episode 81 - Metamorphosis

The Common Descent Podcast

Common Descent

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

4.8 • 764 Ratings

🗓️ 23 February 2020

⏱️ 108 minutes

🔗️ Recording | iTunes | RSS

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Summary

Metamorphosis is the process that turns a caterpillar to a butterfly, a fry to a fish, and a tadpole to a frog. Animals have been metamorphosing for over 500 million years, from early crustaceans to the many fish, amphibians, and arthropods that do it today. Larvae, pupae, and adults are known in the fossil record, but the evolutionary history of this incredible life strategy is still mysterious. In the news: a new tyrannosaur, early chameleons, giant turtles, and dinosaur temperatures. Time markers: Intro & Announcements: 00:00:00News: 00:04:00Main discussion, Part 1: 00:33:30 Main discussion, Part 2: 01:08:30Patron question: 01:43:30 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.
0:19.0	Hello, David. Hello, Will.
0:21.4	And hello, listeners.
0:23.0	Welcome to episode 81 of the Common Assent Podcast.
0:26.5	Welcome back.
0:27.5	Yeah, today we are discussing metamorphosis.
0:31.4	One episode, Gregor Somsa woke up and found himself the topic of Common Descent Podcast.
0:38.3	Too good.
0:47.0	For all you literature fans out there, metamorphosis, because I don't actually know a ton about it.
0:50.6	I didn't either, and I wouldn't say that I do either now.
0:59.5	But it's a really interesting topic for a couple of reasons, one of which being because it is so diverse.
1:01.8	There are so many different groups that do it and so many different versions of an
1:08.9	animal transitioning from one state to another. and the, our fossil understanding of it
1:15.1	is interesting and odd. Right. So we're talking caterpillar to butterfly, tadpole to frog. All of those
1:21.7	classic examples of something that is born in one life stage and then notably changes to a later life stage.
1:30.8	We'll go over the definitions because they are not singular, but it is a very odd phenomenon in
1:37.7	life that is surprisingly common and has taken many different forms as well as had a huge impact on the evolution of life.
1:46.2	So we will go into what it is, what are the varieties of it, not every single one, because
1:52.3	even within a single group of insects, it can be very diverse.
1:56.0	This is but one episode.
1:57.2	Yes.
1:57.8	But we'll go over what are some of the examples of the organisms that metamorphose.
	...

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