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Episodes
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
Apr 25, 2026
Apr 25, 2026
2hr 29 min
Earth is a very flammable world. The combination of heat, oxygen, and burnable plants makes fire a constant feature of our planet. Many modern ecosystems thrive in the presence of fire, and lots of plant and animal species have adapted to avoid or take advantage of the flames. This episode, we explore the diverse topic of fire ecology, and we take a tour through the deep history of fire on Earth.
In the news: Triassic crocs, anglerfish lures, behavior and evolution, and synapsid babies.
Time markers:
Intro & Announcements: 00:00:00
News: 00:06:30
Main discussion, Part 1: 00:48:25
Main discussion, Part 2: 01:35:05
Patron question: 02:17:55
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
Apr 23, 2026
Apr 23, 2026
1hr 19 min
Silver Screen Science is our series where we explore science on the big screen and beyond. This year, we’re taking a tour through cinematic history with Old School Dinosaurs!
This episode, we visit a classic of mid-century caveman-versus-dinosaur cinema, with One Million Years B.C.
Check out our website for blog posts and more: http://commondescentpodcast.com/
Join us on Patreon to support the podcast and enjoy bonus content: https://www.patreon.com/commondescentpodcast
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.
Apr 16, 2026
Apr 16, 2026
1hr 17 min
Silver Screen Science is our series where we explore science on the big screen and beyond. This year, we’re taking a tour through cinematic history with Old School Dinosaurs!
This episode, we compile and compare a handful of dino-themed short films from the early days of dinosaur movies: Gertie the Dinosaur, The Ghost of Slumber Mountain, and the Rite of Spring segment from Disney’s Fantasia.
Check out our website for blog posts and more: http://commondescentpodcast.com/
Join us on Patreon to support the podcast and enjoy bonus content: https://www.patreon.com/commondescentpodcast
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.
Apr 11, 2026
Apr 11, 2026
2hr 19 min
The world is full of food, but in order to make the most of it, living organisms need to be able to break it down and extract the useful nutrients. This episode, we explore the fundamental process of digestion and the many, many ways that life has adapted this process to various diets. And we’ll take a look at what the fossil record has to tell us about ancient diets and the evolutionary history of digestive systems.
In the news: predator bites, coelacanth lungs, Cambrian claws, and squid evolution.
Time markers:
Intro & Announcements: 00:00:00
News: 00:05:55
Main discussion, Part 1: 00:38:10
Main discussion, Part 2: 01:23:30
Patron question: 02:06:50
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
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
Apr 9, 2026
Apr 9, 2026
1hr 15 min
Silver Screen Science is our series where we explore science on the big screen and beyond. This year, we’re taking a tour through cinematic history with Old School Dinosaurs!
This episode, we start things off with the great grand-daddy of dinosaur movies: The Lost World (1925).
Check out our website for blog posts and more: http://commondescentpodcast.com/
Join us on Patreon to support the podcast and enjoy bonus content: https://www.patreon.com/commondescentpodcast
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.
Mar 28, 2026
Mar 28, 2026
2hr 42 min
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
Mar 14, 2026
Mar 14, 2026
2hr 14 min
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
Mar 7, 2026
Mar 7, 2026
1hr 7 min
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 on the super-ancient Pokémon of Hoenn. How could natural selection result in masters of the sea, land, and sky embroiled in an endless feud? Our creatures to create this time: Kyogre, Groudon, and Rayquaza.
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.
Mar 3, 2026
Mar 3, 2026
2hr 23 min
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
Feb 28, 2026
Feb 28, 2026
2hr 36 min
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