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Join David and Will as they explore the paleontologists’ perspective on various topics in life and earth history. Each episode features a main discussion on a topic requested by the listeners, presented as a lighthearted and educational conversation about fossils, evolution, deep time, and more. Before the main discussion, each episode also includes a news segment, covering recent research related to paleontology and evolution. Each episode ends with the answer to a question submitted by subscribers on Patreon. New episodes with new topics every fortnight!
Episodes
59 minutes ago
59 minutes ago
2 hr 18 min
Here on our blue-and-green planet, the green is plants. This episode, Aly joins us again to explore the beginnings of this all-important group of life. We’ll discuss which ancestors gave rise to true plants, what the fossil record tells us about the timing of this momentous event, and the array of key adaptations that allowed plants to join their fungus and animal cousins up on dry land.
In the news: mosasaurs, more mosasaurs, Jurassic mammals, and horned dinosaurs.
Time Markers:
Intro & Announcements: 00:00:00
News: 00:05:25
Main discussion, Part 1: 00:47:35
Main discussion, Part 2: 01:16:05
Patron question: 02:05:35
Join us on Patreon to support the podcast and enjoy bonus content: https://www.patreon.com/commondescentpodcast
Check out our website for this episode’s blog post and more: http://commondescentpodcast.com/
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
9 hours ago
9 hours ago
53 min
Welcome ... to Spookulative Evolution.
It’s Spook-E Season! All throughout October, we pick monsters from myth and media and speculate how they – or something like them – could evolve here on Earth, pulling inspiration from real-world species across our planet’s history. This year’s theme is Aliens!
Our final Spook-E creature for this season comes from sci-fi young adult fiction! How in the world (Earth, specifically) could evolution explain furry, centaur-shaped telepaths? Our creatures to create this time: Andalites.
Join the Common Descent Discord server for more Spook-E 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://commondescentpodcast.com/
The Intro and Outro music is “On the Origin of Species” by Protodome. More music like this at http://ocremix.org.
Oct 17, 2026
Oct 17, 2026
1 hr 10 min
Welcome ... to Spookulative Evolution.
It’s Spook-E Season! All throughout October, we pick monsters from myth and media and speculate how they – or something like them – could evolve here on Earth, pulling inspiration from real-world species across our planet’s history. This year’s theme is Aliens!
This time, we pull an extra-dimensional horror from the world of video games. What might lead natural processes to develop creepy-crawly parasite-hats? Our creates to create this time: Headcrabs.
Join the Common Descent Discord server for more Spook-E 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://commondescentpodcast.com/
The Intro and Outro music is “On the Origin of Species” by Protodome. More music like this at http://ocremix.org.
Oct 10, 2026
Oct 10, 2026
2 hr 13 min
During the Cretaceous Period, while tyrannosaurs stomped around the northern continents, the less famous abelisaurs were the top predatory dinosaurs of the south. This episode, we piece together the history and diversity of these predators, and we explore what they were doing with their bulldog faces, tiny arms, and in some cases, horned faces.
In the news: plesiosaur vomit, seaweed snacks, bat evolution, and flying dinosaurs.
Time Markers:
Intro & Announcements: 00:00:00
News: 00:07:10
Main discussion, Part 1: 00:42:30
Main discussion, Part 2: 01:14:40
Patron question: 02:03:10
Join us on Patreon to support the podcast and enjoy bonus content: https://www.patreon.com/commondescentpodcast
Check out our website for this episode’s blog post and more: http://commondescentpodcast.com/
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
Oct 10, 2026
Oct 10, 2026
1 hr 2 min
Welcome ... to Spookulative Evolution.
It’s Spook-E Season! All throughout October, we pick monsters from myth and media and speculate how they – or something like them – could evolve here on Earth, pulling inspiration from real-world species across our planet’s history. This year’s theme is Aliens!
This episode, we explore the mysterious beings (supposedly) in our own backyard! What evolutionary path can we devise for round-headed, eerie beings lurking just beyond our understanding? Our creatures to create this time: Greys.
Join the Common Descent Discord server for more Spook-E 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://commondescentpodcast.com/
The Intro and Outro music is “On the Origin of Species” by Protodome. More music like this at http://ocremix.org.
Oct 3, 2026
Oct 3, 2026
1 hr 42 min
Welcome ... to Spookulative Evolution.
Spook-E Season is back! All throughout October, we pick monsters from myth and media and speculate how they – or something like them – could evolve here on Earth, pulling inspiration from real-world species across our planet’s history. This year’s theme is Aliens!
Where better to begin than with the quintessential big screen terrors from beyond the stars? How might Earth-based evolution produce a human-hunting monster that’s equal parts predator and parasitoid? Our creatures to create this time: Xenomorphs.
Join the Common Descent Discord server for more Spook-E 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://commondescentpodcast.com/
The Intro and Outro music is “On the Origin of Species” by Protodome. More music like this at http://ocremix.org.
Sep 26, 2026
Sep 26, 2026
2 hr 43 min
Kangaroos – and their wallaroo and wallaby cousins – are some of the most recognizable, charismatic, and impressively strange mammals on the planet. This episode, we explore the surprising diversity of this group, we discuss how they manage to be world’s pre-eminent hoppers, and we delve into some of their unexpected fossil relatives.
In the news: warm tyrannosaurs, sea star ancestors, traveling dinosaurs, and new cats.
Time Markers:
Intro & Announcements: 00:00:00
News: 00:06:35
Main discussion, Part 1: 00:50:30
Main discussion, Part 2: 01:36:40
Patron question: 02:32:45
Join us on Patreon to support the podcast and enjoy bonus content: https://www.patreon.com/commondescentpodcast
Check out our website for this episode’s blog post and more: http://commondescentpodcast.com/
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
Sep 12, 2026
Sep 12, 2026
2 hr 10 min
About 10% of the Earth’s land surface is currently covered in persistent glacial ice, but for most of Earth history, that number was much closer to zero. This episode, we explore what happens when ice overtakes our planet and how we investigate icy conditions of the distant past, and we’ll take a close look at the most recent (and ongoing) global climate event that we commonly call the Ice Age.
In the news: distant space objects, snake embryos, Jurassic chirps, and polar dinosaur nests.
Time Markers:
Intro & Announcements: 00:00:00
News: 00:05:35
Main discussion, Part 1: 00:40:35
Main discussion, Part 2: 01:16:45
Patron question: 02:02:10
Join us on Patreon to support the podcast and enjoy bonus content: https://www.patreon.com/commondescentpodcast
Check out our website for this episode’s blog post and more: http://commondescentpodcast.com/
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
Aug 29, 2026
Aug 29, 2026
2 hr 44 min
The Sun is kind of a big deal. It is the center of our solar system, around which all other objects revolve, and its heat and light are responsible for the life-supporting conditions here on Earth. This episode, we take a close look at how the Sun actually works and what makes it different from other stars. Then, we track the lifetime of the Sun, exploring how it originally formed, how it has changed over its lifetime, and how it will eventually burn out.
In the news: carnivorous plants, ancient burrowers, live birth, and reptile metabolism.
Time Markers:
Intro & Announcements: 00:00:00
News: 00:07:50
Main discussion, Part 1: 00:46:30
Main discussion, Part 2: 01:47:40
Patron question: 02:37:05
💗
https://imaginationlibrary.com/the-dollywood-foundation/
Join us on Patreon to support the podcast and enjoy bonus content: https://www.patreon.com/commondescentpodcast
Check out our website for this episode’s blog post and more: http://commondescentpodcast.com/
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
Aug 15, 2026
Aug 15, 2026
2 hr 21 min
Large, herbivorous mammals come in many shapes and sizes, but few are as famously unusual as camels. This episode, we explore the surprising adaptations of Old World and New World camelids, from the dromedaries of Middle Eastern deserts to the llamas of the Andean highlands. Then, we take a tour through their fossil record to investigate the many forms this family took on the way to our modern diversity.
In the news: stomach stones, aquatic reptiles, tiny dinosaurs, and a Poop Explosion.
Time Markers:
Intro & Announcements: 00:00:00
News: 00:06:20
Main discussion, Part 1: 00:42:30
Main discussion, Part 2: 01:21:40
Patron question: 02:11:05
Join us on Patreon to support the podcast and enjoy bonus content: https://www.patreon.com/commondescentpodcast
Check out our website for this episode’s blog post and more: http://commondescentpodcast.com/
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