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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
Saturday Oct 11, 2025
Saturday Oct 11, 2025
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 Monsters of Nintendo!
This episode, we take a trip to the Kingdom of Hyrule. How might nature develop an octopus-like monster with a penchant for projectiles? Our creatures to create this time: Ocotoroks.
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://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.
Saturday Oct 04, 2025
Saturday Oct 04, 2025
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 Monsters of Nintendo!
This episode, we begin with a baddie from the Mushroom Kingdom. What evolutionary path might generate a pipe-dwelling plant-like predator? Our creatures to create this time: Piranha Plants.
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://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.
Saturday Sep 27, 2025
Saturday Sep 27, 2025
The faces of vertebrate animals are often soft and full of teeth, but there is a common alternative. Birds, turtles, and many more groups have developed toothless snouts covered in a tough sheath. This episode, we’ll explore the defining features of beaks and their various functions. And we’ll take a tour through animal life past and present to investigate the reasons behind the repeated evolution of beaks among dinosaurs and beyond.
In the news: Life on Mars, ancient sharks, mammoth microbes, and ant-eaters.
Time markers:
Intro & Announcements: 00:00:00
News: 00:07:00
Main discussion, Part 1: 00:42:40
Main discussion, Part 2: 01:38:25
Patron question: 02:21:50
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
Subscribe to Curiosity Box using our Affiliate Link: https://www.curiositybox.com/CommonDescent
And get 25% off the first box with code descent25
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
Saturday Sep 13, 2025
Saturday Sep 13, 2025
Dodos are probably the single most famous case of recent human-induced extinction. First documented in the late 1500s and extinct within a century, dodos have become a global reminder of the devastating potential of human activity. This episode, we review the brief history of human interactions with dodos, and we explore what recent research and fossil evidence has taught us about these birds and their closest relatives.
In the news: Cretaceous crocs, extra-spiky dinosaurs, turtles of the sea, and cave fish evolution.
Time markers:
Intro & Announcements: 00:00:00
News: 00:05:45
Main discussion, Part 1: 00:33:10
Main discussion, Part 2: 01:06:00
Patron question: 01:56:50
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
Subscribe to Curiosity Box using our Affiliate Link: https://www.curiositybox.com/CommonDescent
And get 25% off the first box with code descent25
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
Saturday Aug 30, 2025
Saturday Aug 30, 2025
Forests are among the most widespread and diverse biomes on our planet. This episode, we’re joined by our favorite paleobotanist, Dr. Aly Baumgartner, to explore what defines a forest, how these habitats function, and how they differ around the globe. Then, we’ll take a trip into the past to discuss how paleontologists study ancient forests and how these biomes have changed over hundreds of millions of years.
In the news: ocean sediments, early penguins, island foxes, Canadian dragonflies, and ancient deer.
Time markers:
Intro & Announcements: 00:00:00
News: 00:06:00
Main discussion, Part 1: 00:37:30
Main discussion, Part 2: 01:47:10
Patron question: 02:48:35
Check out our website for this episode’s blog post and more: http://commondescentpodcast.com/
Listen to more Plants with Aly on Leaf it to Us!
https://commondescentpodcast.com/leaf-it-to-us/
Join us on Patreon to support the podcast and enjoy bonus content: https://www.patreon.com/commondescentpodcast
Subscribe to Curiosity Box using our Affiliate Link: https://www.curiositybox.com/CommonDescent
And get 25% off the first box with code descent25
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
Saturday Aug 16, 2025
Saturday Aug 16, 2025
Most vertebrate animals on land get around on all fours, but some of us have committed to two-legged locomotion. This episode, we explore the various ways animals have evolved bipedalism and the many benefits that come with it. We’ll also take a look at how we identify bipedal animals in the fossil record, and we’ll zoom in on the evolutionary story behind Earth history’s most successful bipeds.
In the news: potato origins, trilobite legs, bone worm burrows, and australopithecine sexes.
Time markers:
Intro & Announcements: 00:00:00
News: 00:07:35
Main discussion, Part 1: 00:35:15
Main discussion, Part 2: 01:10:50
Patron question: 02:05:55
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
Subscribe to Curiosity Box using our Affiliate Link: https://www.curiositybox.com/CommonDescent
And get 25% off the first box with code descent25
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
Saturday Aug 02, 2025
Saturday Aug 02, 2025
Mutation. It is the key to our evolution. As our cells constantly divide and reproduce and replicate our DNA, errors and inconsistencies develop, leading to the incredible variation of life that drives evolutionary change. This episode, we explore the genetic mechanisms behind mutation and we discuss how scientists study mutations to understand the evolutionary history of life on Earth.
In the news: Neanderthal tools, caiman food, dancing dinosaurs, and ancient integument.
Time markers:
Intro & Announcements: 00:00:00
News: 00:09:25
Main discussion, Part 1: 00:40:50
Main discussion, Part 2: 01:35:00
Patron question: 02:28:55
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
Saturday Jul 19, 2025
Saturday Jul 19, 2025
On the outside, shrews might seem like standard tiny mammals, but their anatomy and lifestyle are highly specialized. This episode, with help from special guest Derek den Ouden, we explore the diverse habits of shrews, the anatomical features that set them apart, and how they thrive worldwide despite being perpetually on the brink of starvation. Then, we consider the extinct diversity of shrews in the fossil record.
In the news: stubborn bass, choking fish, tomato defenses, and some really old rocks.
Time markers:
Intro & Announcements: 00:00:00
News: 00:09:35
Main discussion, Part 1: 00:45:25
Main discussion, Part 2: 01:40:50
Patron question: 02:12:35
Find Derek online at @DenoudenDerek
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
Check out our friends’ new data management app, Cnidarity: https://cnidarity.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
Saturday Jul 05, 2025
Saturday Jul 05, 2025
Lizards are extremely good at becoming snake-shaped. A long body with small or absent limbs is a shape that has evolved dozens of times across nearly every major lineage of lizards. This episode, we explore the diversity of leglessness in lizards, we discuss which groups have done it and which groups have done it best, and we examine what’s known about the repeated evolution of this unexpected body shape.
In the news: giant dusky salamander, very early footprints, a Denisovan skull, a mammoth tusk boomerang, and night lizards.
Time markers:
Intro & Announcements: 00:00:00
News: 00:06:25
Main discussion, Part 1: 00:41:50
Main discussion, Part 2: 01:33:55
Patron question: 02:16:35
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
Happy Disability Pride Month!
AmeriDisability https://www.ameridisability.com/
National Disability Rights Network https://www.ndrn.org/
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
Saturday Jun 21, 2025
Saturday Jun 21, 2025
Today’s crocs are iconic semi-aquatic predators, but their extended family tree features lots of land-dwelling cousins. This episode, we take a tour through croc evolutionary history and explore the many times these reptiles have taken to life on dry land. We’ll examine what features these terrestrial crocs shared, which ones they didn’t, and what their fossils tell us about how the shape of crocs has changed over time.
In the news: sauropod guts, Australian biomarkers, butterfly scales, and tropical archosaurs.
Time markers:
Intro & Announcements: 00:00:00
News: 00:07:25
Main discussion, Part 1: 00:44:20
Main discussion, Part 2: 01:23:20
Patron question: 02:17:25
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