The Common Descent Podcast

Common Descent
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Mar 29, 2026 • 2h 42min

Episode 240 - Terror Birds

For most of the Cenozoic Era, South America was home to an incredible group of predatory birds called phorusrhacids, which included some of the largest carnivorous birds of all time. With their giant axe-like beaks and powerful clawed legs, these giants have gained the nickname “terror birds.” This episode, we explore what makes these birds unique, how they varied across their diversity, and what exactly they were doing with all those terrifying tools. In the news: a bitten plesiosaur, wildflower adaptation, a new croc, and dinosaur parents. Time markers: Intro & Announcements: 00:00:00 News: 00:06:25 Main discussion, Part 1: 00:51:30 Main discussion, Part 2: 01:29:30 Patron question: 02:30:05 Some helpful links mentioned in the Announcements: The Trevor Project: https://www.thetrevorproject.org/ The National Immigrant Justice Center: https://immigrantjustice.org/ Pal Humanity: https://chuffed.org/project/122818-support-north-gaza-rebuilding-lives-restoring-hope-with-pal-humanity?utm_source=ig&utm_medium=social&utm_content=link_in_bio Check out our website for this episode’s blog post and more: 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/ Lots more ways to connect with us: https://linktr.ee/common_descent 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 3.0 http://creativecommons.org/licenses/by/3.0
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Mar 15, 2026 • 2h 14min

Episode 239 - Nocturnality

Creatures of the night! The world is a different place in the dark, and a whole array of organisms have adapted to being most active outside of daytime hours. This episode, we’ll explore the regular traits that allow nocturnal animals to get by, we’ll discuss some of the ways nocturnal evolution has shaped living species, and we’ll investigate which – if any – of these traits we can identify in the fossil record. In the news: snake hormones, Australian amphibians, ancient microbes, and baby dinosaurs. Time markers: Intro & Announcements: 00:00:00 News: 00:07:25 Main discussion, Part 1: 00:39:15 Main discussion, Part 2: 01:14:30 Patron question: 02:03:45 Check out our website for this episode’s blog post and more: 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/ Lots more ways to connect with us: https://linktr.ee/common_descent 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 3.0 http://creativecommons.org/licenses/by/3.0
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Mar 7, 2026 • 1h 7min

Pok-É – Kyogre, Groudon, and Rayquaza

Speculation on how sea, land, and sky titans might evolve from real-world animals. Imaginative comparisons to whales, pliosaurs, armadillos, and giant serpents. Discussion of seasonal hunts, territorial conflicts, and natural explanations for massive primal transformations.
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Mar 3, 2026 • 2h 24min

Patron Mini-Episode Compilation #7

One of the benefits our Patrons can receive is a personalized mini-episode on an animal of their choice! Every now and then, we throw them together into a compilation for all to enjoy!  As always, an enormous thanks to all of our wonderful Patrons! Time markers: Basal Ornithopods for Aaron: 00:02:00 Orangutans for Justin: 00:22:30 Tardigrades for Jeff: 00:54:25 Trilobites for Timpaxew: 01:16:55 Rauisuchians for Ryan: 01:36:45 Ravens for Bogdraw: 01:56:15 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/ Lots more ways to connect with us: https://linktr.ee/common_descent 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 3.0 http://creativecommons.org/licenses/by/3.0
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Mar 1, 2026 • 2h 36min

Episode 238 - Osteoderms (Skin Bones)

Some bones are only skin deep! In many species of reptiles, mammals, and amphibians, bones called osteoderms develop within the skin, serving as body armor, additional muscular support, display features, or any number of other functions. This episode, we explore the extraordinary diversity of osteoderm anatomy, we take a tour through the many and varied osteoderms of Earth history, and we investigate a long list of hypothesized functions for these unusual bones. In the news: reptile skin, dinosaur quills, dinosaur bites, and cannibal snakes. Time markers: Intro & Announcements: 00:00:00 News: 00:06:25 Main discussion, Part 1: 00:46:35 Main discussion, Part 2: 01:26:35 Patron question: 02:24:05 Check out our website for this episode’s blog post and more: 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/ Lots more ways to connect with us: https://linktr.ee/common_descent 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 3.0 http://creativecommons.org/licenses/by/3.0
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Feb 28, 2026 • 1h 6min

Pok-É – Koraidon and Miraidon

Welcome ... to Pok-É! This year is the 30th anniversary of the Pokémon franchise, so we’re picking some of our favorite Legendary Pokémon and speculating upon how they – or something like them – might evolve in real life, pulling inspiration from species throughout our planet’s history! This episode, we take a tour of the Paradox Pokémon. Where on the tree of life could we find a pair of dragons built for battle and all-terrain travel? Our creatures to create this time: Koraidon and Miraidon. Join the Common Descent Discord server for more Pok-É discussion! https://discord.gg/CwPBxdh9Ev Join us on Patreon to support the podcast and enjoy bonus content: https://www.patreon.com/commondescentpodcast More ways to connect with us: https://linktr.ee/common_descent The Intro and Outro music is “On the Origin of Species” by Protodome. More music like this at http://ocremix.org.
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Feb 21, 2026 • 1h 3min

Pok-É – Zygarde

Welcome ... to Pok-É! This year is the 30th anniversary of the Pokémon franchise, so we’re picking some of our favorite Legendary Pokémon and speculating upon how they – or something like them – might evolve in real life, pulling inspiration from species throughout our planet’s history! This episode, we grapple with the Order Pokémon. What biological explanations can we find for an ecological guardian of many, many faces? Our creature to create this time: Zygarde. Join the Common Descent Discord server for more Pok-É discussion! https://discord.gg/CwPBxdh9Ev Join us on Patreon to support the podcast and enjoy bonus content: https://www.patreon.com/commondescentpodcast More ways to connect with us: https://linktr.ee/common_descent The Intro and Outro music is “On the Origin of Species” by Protodome. More music like this at http://ocremix.org.
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Feb 15, 2026 • 3h 8min

Episode 237 - The Dinosaur Renaissance

In the mid-to-late 20th Century, dinosaurs received a major makeover in their scientific and popular image. This episode, Riley Black takes us through the timeline of the Dinosaur Renaissance. We discuss some of the big scientific milestones and the various players which brought dinosaurs into their modern era, and we’ll explore the early signs and lingering notes of this historic shift. In the news: sleepy jellyfish, fast mammals, bird beaks, and dinosaur diets. Find Riley in these places: https://rileyblack.net/ https://bsky.app/profile/restingdinoface.bsky.social https://us.macmillan.com/author/rileyblack Time markers: Intro & Announcements: 00:00:00 News: 00:07:30 Main discussion, Part 1: 00:53:30 Main discussion, Part 2: 01:43:30 Patron question: 02:56:25 Check out our website for this episode’s blog post and more: 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/ Lots more ways to connect with us: https://linktr.ee/common_descent 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 3.0 http://creativecommons.org/licenses/by/3.0
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Feb 14, 2026 • 51min

Pok-É – Giratina

Welcome ... to Pok-É! This year is the 30th anniversary of the Pokémon franchise, so we’re picking some of our favorite Legendary Pokémon and speculating upon how they – or something like them – might evolve in real life, pulling inspiration from species throughout our planet’s history! This episode, we confront the Renegade Pokémon. From what ancestors might we get a many-limbed monster from a parallel world? Our creature to create this time: Giratina. Join the Common Descent Discord server for more Pok-É discussion! https://discord.gg/CwPBxdh9Ev Join us on Patreon to support the podcast and enjoy bonus content: https://www.patreon.com/commondescentpodcast More ways to connect with us: https://linktr.ee/common_descent The Intro and Outro music is “On the Origin of Species” by Protodome. More music like this at http://ocremix.org.
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Feb 7, 2026 • 58min

Pok-É – Lugia

Welcome ... to Pok-É! This year is the 30th anniversary of the Pokémon franchise, so we’re picking some of our favorite Legendary Pokémon and speculating upon how they – or something like them – might evolve in real life, pulling inspiration from species throughout our planet’s history! This episode, we set our sights on the Diving Pokémon. How might evolution produce a sea-dwelling bird with a knack for stirring up storms? Our creature to create this time: Lugia. Join the Common Descent Discord server for more Pok-É discussion! https://discord.gg/CwPBxdh9Ev Join us on Patreon to support the podcast and enjoy bonus content: https://www.patreon.com/commondescentpodcast More ways to connect with us: https://linktr.ee/common_descent The Intro and Outro music is “On the Origin of Species” by Protodome. More music like this at http://ocremix.org.

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