Join hosts Hank Green, Kallie Moore, and Blake de Pastino as they take you on a journey through the history of life on Earth. From the dawn of life in the Archaean Eon through the Mesozoic Era — the so-called “Age of Dinosaurs” -- right up to the end of the most recent Ice Age. The evolutionary history of mammals including humans and other modern species is explored with these amazing paleontology experts.
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| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 2017 | Episode 1 | The Trouble With Trilobites | 2017-06-26 | min |
| Season 2017 | Episode 2 | When Did the First Flower Bloom? | 2017-07-03 | min |
| Season 2017 | Episode 3 | The Tully Monster & Other Problematic Creatures | 2017-07-11 | min |
| Season 2017 | Episode 4 | Stegosaurs: Tiny Brains & Thagomizers | 2017-07-17 | min |
| Season 2017 | Episode 5 | What Colors Were Dinosaurs? | 2017-07-24 | min |
| Season 2017 | Episode 6 | The Story of Saberteeth | 2017-07-31 | min |
| Season 2017 | Episode 7 | That Time Oxygen Almost Killed Everything | 2017-08-07 | min |
| Season 2017 | Episode 8 | The Biggest Thing That Ever Flew | 2017-08-14 | min |
| Season 2017 | Episode 9 | Dimetrodon: Our Most Unlikely Ancestor | 2017-08-21 | min |
| Season 2017 | Episode 10 | The Extinction That Never Happened | 2017-08-28 | min |
| Season 2017 | Episode 11 | The Strange Case of the Buzzsaw Jaws | 2017-09-11 | min |
| Season 2017 | Episode 12 | The Age of Giant Insects | 2017-09-18 | min |
| Season 2017 | Episode 13 | History's Most Powerful Plants | 2017-09-26 | min |
| Season 2017 | Episode 14 | How Did Dinosaurs Get So Huge? | 2017-10-02 | min |
| Season 2017 | Episode 15 | When The Earth Was Purple | 2017-10-09 | min |
| Season 2017 | Episode 16 | 'Living Fossils' Aren't Really a Thing | 2017-10-16 | min |
| Season 2017 | Episode 17 | When Whales Walked | 2017-10-23 | min |
| Season 2017 | Episode 18 | An Illustrated History of Dinosaurs | 2017-10-30 | min |
| Season 2017 | Episode 19 | A Brief History of Geologic Time | 2017-11-06 | min |
| Season 2017 | Episode 20 | The Search for the Earliest Life | 2017-11-20 | min |
| Season 2017 | Episode 21 | The Facts About Dinosaurs & Feathers | 2017-11-27 | min |
| Season 2017 | Episode 22 | The Last Time the Globe Warmed | 2017-12-04 | min |
| Season 2017 | Episode 23 | What Happened to the World's Greatest Ape? | 2017-12-11 | min |
| Season 2017 | Episode 24 | When Giant Fungi Ruled | 2017-12-18 | min |
| Season 2018 | Episode 1 | How Two Microbes Changed History | 2018-01-15 | min |
| Season 2018 | Episode 2 | The Time Terror Birds Invaded | 2018-01-22 | min |
| Season 2018 | Episode 3 | Untangling the Devil's Corkscrew | 2018-01-29 | min |
| Season 2018 | Episode 4 | The Great Snake Debate | 2018-02-05 | min |
| Season 2018 | Episode 5 | The Whole Saga of the Supercontinents | 2018-02-12 | min |
| Season 2018 | Episode 6 | From the Cambrian Explosion to the Great Dying | 2018-02-20 | min |
| Season 2018 | Episode 7 | How Sex Became a Thing | 2018-02-26 | min |
| Season 2018 | Episode 8 | The Other Explosion You Should Know About | 2018-03-05 | min |
| Season 2018 | Episode 9 | How the Turtle Got Its Shell | 2018-03-12 | min |
| Season 2018 | Episode 10 | What a Dinosaur Looks Like Under a Microscope | 2018-03-19 | min |
| Season 2018 | Episode 11 | The Most Useful Fossils in the World | 2018-03-26 | min |
| Season 2018 | Episode 12 | Inside the Dinosaur Library | 2018-04-02 | min |
| Season 2018 | Episode 13 | What Was the Ancestor of Everything? | 2018-04-11 | min |
| Season 2018 | Episode 14 | How the Squid Lost Its Shell | 2018-04-17 | min |
| Season 2018 | Episode 15 | How the Chalicothere Split In Two | 2018-04-24 | min |
| Season 2018 | Episode 16 | The Age of Reptiles in Three Acts | 2018-05-02 | min |
| Season 2018 | Episode 17 | The Weird, Watery Tale of Spinosaurus | 2018-05-08 | min |
| Season 2018 | Episode 18 | From the Fall of Dinos to the Rise of Humans | 2018-05-16 | min |
| Season 2018 | Episode 19 | That Time It Rained for Two Million Years | 2018-05-22 | min |
| Season 2018 | Episode 20 | Why Triassic Animals Were Just the Weirdest | 2018-06-05 | min |
| Season 2018 | Episode 21 | Where Did Viruses Come From? | 2018-06-12 | min |
| Season 2018 | Episode 22 | When Fish First Breathed Air | 2018-06-19 | min |
| Season 2018 | Episode 23 | How the T-Rex Lost Its Arms | 2018-06-26 | min |
| Season 2018 | Episode 24 | FAQs From Our First Year | 2018-07-03 | min |
| Season 2018 | Episode 25 | When Insects First Flew | 2018-07-10 | min |
| Season 2018 | Episode 26 | The Mystery of the Eocene's Lethal Lake | 2018-07-17 | min |
| Season 2018 | Episode 27 | When Fish Wore Armor | 2018-07-24 | min |
| Season 2018 | Episode 28 | When Birds Had Teeth | 2018-08-07 | min |
| Season 2018 | Episode 29 | How Horses Took Over North America (Twice) | 2018-08-14 | min |
| Season 2018 | Episode 30 | How a Supervolcano Made the Cenozoic's Coolest Fossils | 2018-08-22 | min |
| Season 2018 | Episode 31 | The Rise and Fall of the Bone-Crushing Dogs | 2018-08-28 | min |
| Season 2018 | Episode 32 | Life, Sex & Death Among the Dire Wolves | 2018-09-06 | min |
| Season 2018 | Episode 33 | When We First Walked | 2018-09-11 | min |
| Season 2018 | Episode 34 | Did Raptorex Really Exist? | 2018-09-18 | min |
| Season 2018 | Episode 35 | Can We Get DNA From Fossils? | 2018-10-02 | min |
| Season 2018 | Episode 36 | When Giant Amphibians Reigned | 2018-10-09 | min |
| Season 2018 | Episode 37 | Your Place in the Primate Family Tree | 2018-10-16 | min |
| Season 2018 | Episode 38 | The Two People We're All Related To | 2018-10-23 | min |
| Season 2018 | Episode 39 | When Rodents Rafted Across the Ocean | 2018-11-06 | min |
| Season 2018 | Episode 40 | When Birds Stopped Flying | 2018-11-14 | min |
| Season 2018 | Episode 41 | When Camels Roamed North America | 2018-11-20 | min |
| Season 2018 | Episode 42 | How Sloths Went From the Seas to the Trees | 2018-11-28 | min |
| Season 2018 | Episode 43 | When Sharks Swam the Great Plains | 2018-12-04 | min |
| Season 2018 | Episode 44 | When Apes Conquered Europe | 2018-12-11 | min |
| Season 2018 | Episode 45 | Why Megalodon (Definitely) Went Extinct | 2018-12-19 | min |
| Season 2019 | Episode 1 | When Humans Were Prey | 2019-01-08 | min |
| Season 2019 | Episode 2 | How Blood Evolved (Many Times) | 2019-01-15 | min |
| Season 2019 | Episode 3 | The Humans That Lived Before Us | 2019-01-29 | min |
| Season 2019 | Episode 4 | The Island of Shrinking Mammoths | 2019-02-05 | min |
| Season 2019 | Episode 5 | The Evolution of the Heart (A Love Story) | 2019-02-13 | min |
| Season 2019 | Episode 6 | How 7,000 Years of Epic Floods Changed the World | 2019-02-27 | min |
| Season 2019 | Episode 7 | The Island of Huge Hamsters and Giant Owls | 2019-03-05 | min |
| Season 2019 | Episode 8 | The Giant Bird That Got Lost in Time | 2019-03-12 | min |
| Season 2019 | Episode 9 | When We First Made Tools | 2019-03-26 | min |
| Season 2019 | Episode 10 | When Giant Scorpions Swarmed the Seas | 2019-04-02 | min |
| Season 2019 | Episode 11 | When We Tamed Fire | 2019-04-09 | min |
| Season 2019 | Episode 12 | The Mystery Behind the Biggest Bears of All Time | 2019-04-23 | min |
| Season 2019 | Episode 13 | The Croc That Ran on Hooves | 2019-05-01 | min |
| Season 2019 | Episode 14 | When We Took Over the World | 2019-05-07 | min |
| Season 2019 | Episode 15 | The Ghostly Origins of the Big Cats | 2019-05-16 | min |
| Season 2019 | Episode 16 | The History of Climate Cycles (and the Woolly Rhino) Explained | 2019-05-30 | min |
| Season 2019 | Episode 17 | The Hellacious Lives of the "Hell Pigs" | 2019-06-05 | min |
| Season 2019 | Episode 18 | How Evolution Works (And How We Figured It Out) | 2019-06-11 | min |
| Season 2019 | Episode 19 | When the Synapsids Struck Back | 2019-06-19 | min |
| Season 2019 | Episode 20 | When Ichthyosaurs Led a Revolution in the Seas | 2019-06-25 | min |
| Season 2019 | Episode 21 | When We Met Other Human Species | 2019-07-09 | min |
| Season 2019 | Episode 22 | How Volcanoes Froze the Earth (Twice) | 2019-07-17 | min |
| Season 2019 | Episode 23 | How Earth's First, Unkillable Animals Saved the World | 2019-07-30 | min |
| Season 2019 | Episode 24 | When Giant Deer Roamed Eurasia | 2019-08-07 | min |
| Season 2019 | Episode 25 | Was This Dinosaur a Cannibal? | 2019-08-14 | min |
| Season 2019 | Episode 26 | The Missing Link That Wasn't | 2019-08-21 | min |
| Season 2019 | Episode 27 | The Raptor That Made Us Rethink Dinosaurs | 2019-08-28 | min |
| Season 2019 | Episode 28 | When Bats Took Flight | 2019-09-11 | min |
| Season 2019 | Episode 29 | How Pterosaurs Got Their Wings | 2019-09-18 | min |
| Season 2019 | Episode 30 | When Giant Lemurs Ruled Madagascar | 2019-09-25 | min |
| Season 2019 | Episode 31 | When Antarctica Was Green | 2019-10-03 | min |
| Season 2019 | Episode 32 | The (Ovi)Raptor That Paleontologists Got Wrong | 2019-10-16 | min |
| Season 2019 | Episode 33 | When Hobbits Were Real | 2019-10-22 | min |
| Season 2019 | Episode 34 | Were These Monsters Inspired by Fossils? | 2019-10-29 | min |
| Season 2019 | Episode 35 | How We Domesticated Cats (Twice) | 2019-11-06 | min |
| Season 2019 | Episode 36 | When Giant Hypercarnivores Prowled Africa | 2019-11-19 | min |
| Season 2019 | Episode 37 | Why Male Mammoths Lost the Game | 2019-11-26 | min |
| Season 2019 | Episode 38 | The Forgotten Story of the Beardogs | 2019-12-12 | min |
| Season 2019 | Episode 39 | The Fuzzy Origins of the Giant Panda | 2019-12-17 | min |
| Season 2020 | Episode 1 | That Time the Mediterranean Sea Disappeared | 2020-01-09 | min |
| Season 2020 | Episode 2 | The Neanderthals That Taught Us About Humanity | 2020-01-16 | min |
| Season 2020 | Episode 3 | The Giant Dinosaur That Was Missing a Body | 2020-01-28 | min |
| Season 2020 | Episode 4 | How South America Made the Marsupials | 2020-02-04 | min |
| Season 2020 | Episode 5 | A Short Tale About Diplodocus' Long Neck | 2020-02-11 | min |
| Season 2020 | Episode 6 | When the Rainforests Collapsed | 2020-02-19 | min |
| Season 2020 | Episode 7 | How a Hot Planet Created the World's Biggest Snake | 2020-02-27 | min |
| Season 2020 | Episode 8 | When the Sahara Was Green | 2020-03-10 | min |
| Season 2020 | Episode 9 | When Penguins Went From The Sky To The Sea | 2020-03-18 | min |
| Season 2020 | Episode 10 | How the Egg Came First | 2020-03-25 | min |
| Season 2020 | Episode 11 | How Dogs (Eventually) Became Our Best Friends | 2020-03-31 | min |
| Season 2020 | Episode 12 | When a Billion Years Disappeared | 2020-04-15 | min |
| Season 2020 | Episode 13 | The Risky Paleo Diets of Our Ancestors | 2020-04-22 | min |
| Season 2020 | Episode 14 | How the Andes Mountains Might Have Killed a Bunch of Whales | 2020-04-29 | min |
| Season 2020 | Episode 15 | How Plants Caused the First Mass Extinction | 2020-05-12 | min |
| Season 2020 | Episode 16 | The Two Viruses That We've Had For Millions of Years | 2020-05-20 | min |
| Season 2020 | Episode 17 | How We Identified One of Earth's Earliest Animals | 2020-05-28 | min |
| Season 2020 | Episode 18 | When Dinosaur Look-Alikes Ruled the Earth | 2020-06-09 | min |
| Season 2020 | Episode 19 | The World Before Plate Tectonics | 2020-06-16 | min |
| Season 2020 | Episode 20 | When Dinosaurs Chilled in the Arctic | 2020-06-24 | min |
| Season 2020 | Episode 21 | How the Walrus Got Its Tusks | 2020-07-07 | min |
| Season 2020 | Episode 22 | The Story of the Dino Stampede | 2020-07-16 | min |
| Season 2020 | Episode 23 | The Biggest Frog that Ever Lived | 2020-07-23 | min |
| Season 2020 | Episode 24 | The Dinosaur Who Was Buried at Sea | 2020-08-05 | min |
| Season 2020 | Episode 25 | How We Figured Out Fermentation | 2020-08-13 | min |
| Season 2020 | Episode 26 | The Oddest Couple in the Fossil Record | 2020-08-20 | min |
| Season 2020 | Episode 27 | How Ancient Art Captured Australian Megafauna | 2020-09-02 | min |
| Season 2020 | Episode 28 | The Sea Monster from the Andes | 2020-09-10 | min |
| Season 2020 | Episode 29 | When Rodents Had Horns | 2020-09-15 | min |
| Season 2020 | Episode 30 | The First and Last North American Primates | 2020-09-30 | min |
| Season 2020 | Episode 31 | How Plants Became Carnivores | 2020-10-07 | min |
| Season 2020 | Episode 32 | How Ankylosaurs Got Their Clubs | 2020-10-13 | min |
| Season 2020 | Episode 33 | Why Do Things Keep Evolving Into Crabs? | 2020-10-28 | min |
| Season 2020 | Episode 34 | How Plankton Created A Bizarre Giant of the Seas | 2020-11-10 | min |
| Season 2020 | Episode 35 | The Rise and Fall of the Tallest Mammal to Walk the Earth | 2020-11-19 | min |
| Season 2020 | Episode 36 | How Humans Lost Their Fur | 2020-12-02 | min |
| Season 2020 | Episode 37 | When Lizards Took Over the World | 2020-12-09 | min |
| Season 2020 | Episode 38 | When the Earth Suddenly Stopped Warming | 2020-12-17 | min |
| Season 2020 | Episode 39 | The Triassic Reptile With "Two Faces" | 2020-12-22 | min |
| Season 2021 | Episode 1 | What Happened to the World's Biggest Beaver? | 2021-01-13 | min |
| Season 2021 | Episode 2 | The Reign of the Hell Ants | 2021-01-21 | min |
| Season 2021 | Episode 3 | The Pandemic That Lasted 15 Million Years | 2021-01-28 | min |
| Season 2021 | Episode 4 | When We First Talked | 2021-02-11 | min |
| Season 2021 | Episode 5 | The Return of Giant Skin-Shell Sea Turtles | 2021-02-17 | min |
| Season 2021 | Episode 6 | The Genes We Lost Along the Way | 2021-02-24 | min |
| Season 2021 | Episode 7 | Our Bizarre, Possibly Venomous, Relative | 2021-03-10 | min |
| Season 2021 | Episode 8 | How Worm Holes Ended Wormworld | 2021-03-18 | min |
| Season 2021 | Episode 9 | How Humans Became (Mostly) Right-Handed | 2021-03-24 | min |
| Season 2021 | Episode 10 | How Chilis Got Spicy (and Why We Love the Burn) | 2021-04-07 | min |
| Season 2021 | Episode 11 | How To Survive the Little Ice Age | 2021-04-20 | min |
| Season 2021 | Episode 12 | When Crocs Thrived in the Seas | 2021-04-29 | min |
| Season 2021 | Episode 13 | When Trees Took Over the World | 2021-05-12 | min |
| Season 2021 | Episode 14 | How Weasels Got Skinny | 2021-05-20 | min |
| Season 2021 | Episode 15 | Where Are All The Squid Fossils? | 2021-06-03 | min |
| Season 2021 | Episode 16 | Did These Giant Sloths Poop Themselves to Death? | 2021-07-14 | min |
| Season 2021 | Episode 17 | The Traits That Spawned the Age of Mammals | 2021-07-21 | min |
| Season 2021 | Episode 18 | The Island of the Last Surviving Mammoths | 2021-07-29 | min |
| Season 2021 | Episode 19 | Where Are All the Medium-Sized Dinosaurs? | 2021-08-12 | min |
| Season 2021 | Episode 20 | How the Starfish Got Its Arms | 2021-08-24 | min |
| Season 2021 | Episode 21 | The Creature That Stumped Darwin | 2021-09-01 | min |
| Season 2021 | Episode 22 | How Pollination Got Going Twice | 2021-09-16 | min |
| Season 2021 | Episode 23 | How a Supervolcano Ignited an Evolutionary Debate | 2021-09-23 | min |
| Season 2021 | Episode 24 | How a Mass Extinction Event Created the Amazon | 2021-09-29 | min |
| Season 2021 | Episode 25 | When Mammals Only Went Out At Night | 2021-10-07 | min |
| Season 2021 | Episode 26 | How Ancient Whales May Have Changed the Deep Ocean | 2021-10-21 | min |
| Season 2021 | Episode 27 | How Dinosaurs Coupled Up | 2021-10-28 | min |
| Season 2021 | Episode 28 | When It Was Too Hot for Leaves | 2021-11-17 | min |
| Season 2021 | Episode 29 | Why The Paleo Diet Couldn't Save The Neanderthals | 2021-12-02 | min |
| Season 2021 | Episode 30 | The Fossil Record In Your Mouth | 2021-12-09 | min |
| Season 2021 | Episode 31 | When Pterosaurs Walked | 2021-12-16 | min |
| Season 2022 | Episode 1 | How Our Deadliest Parasite Turned to the Dark Side | 2022-01-11 | min |
| Season 2022 | Episode 2 | Primates vs Snakes (An Evolutionary Arms Race) | 2022-01-19 | min |
| Season 2022 | Episode 3 | How the Rise of Social Insects Shrunk These Dinosaurs | 2022-01-27 | min |
| Season 2022 | Episode 4 | How Vertebrates Got Teeth... And Lost Them Again | 2022-02-08 | min |
| Season 2022 | Episode 5 | How Horses Went From Food To Friends | 2022-02-16 | min |
| Season 2022 | Episode 6 | Why We Only Have Ten Toes (It's a Long Story) | 2022-02-23 | min |
| Season 2022 | Episode 7 | When a Giant Pterosaur Ruled the European Islands | 2022-03-15 | min |
| Season 2022 | Episode 8 | The Sudden Rise of the First Colossal Animal | 2022-03-22 | min |
| Season 2022 | Episode 9 | The Extreme Hyenas That Didn't Last | 2022-03-29 | min |
| Season 2022 | Episode 10 | How the Smallest Animal Got So Simple | 2022-04-13 | min |
| Season 2022 | Episode 11 | Why Sour May Be The Oldest Taste | 2022-04-20 | min |
| Season 2022 | Episode 12 | The Ancient Human Species With A Missing Body | 2022-04-27 | min |
| Season 2022 | Episode 13 | When Ants Domesticated Fungi | 2022-05-10 | min |
| Season 2022 | Episode 14 | The Curious Case of the Cave Lion | 2022-05-17 | min |
| Season 2022 | Episode 15 | Is This The Oldest Dad In The Fossil Record? | 2022-05-26 | min |
| Season 2022 | Episode 16 | How To Build A Woolly Mammoth (But Should We?) | 2022-06-08 | min |
| Season 2022 | Episode 17 | Something Has Been Making This Mark For 500 Million Years | 2022-06-15 | min |
| Season 2022 | Episode 18 | Giant Viruses Blur The Line Between Alive and Not | 2022-06-29 | min |
| Season 2022 | Episode 19 | When Giant Millipedes Reigned | 2022-07-13 | min |
| Season 2022 | Episode 20 | How Plate Tectonics Transformed Los Angeles | 2022-07-21 | min |
| Season 2022 | Episode 21 | Why Does Caffeine Exist? | 2022-07-28 | min |
| Season 2022 | Episode 22 | Did An Ancient Pathogen Reshape Our Cells? | 2022-08-11 | min |
| Season 2022 | Episode 23 | How Whale Evolution Kind Of Sucked | 2022-08-18 | min |
| Season 2022 | Episode 24 | The Fungi That Turned Ants Into Zombies | 2022-08-23 | min |
| Season 2022 | Episode 25 | Where Did Water Come From? | 2022-09-27 | min |
| Season 2022 | Episode 26 | Our Ancient Relative That Said 'No Thanks' To Life On Land | 2022-10-04 | min |
| Season 2022 | Episode 27 | Darwin Missed An Example of Evolution Right Under His Nose | 2022-10-18 | min |
| Season 2022 | Episode 28 | Are We All Actually Archaea? | 2022-10-25 | min |
| Season 2022 | Episode 29 | How Plate Tectonics Gave Us Seahorses | 2022-11-08 | min |
| Season 2022 | Episode 30 | We Met Neandertals Way Earlier Than We Thought | 2022-11-16 | min |
| Season 2022 | Episode 31 | Thylacoleo Is The Missing Australian Apex Predator | 2022-12-06 | min |
| Season 2022 | Episode 32 | How Did Lucy Live and Die? | 2022-12-14 | min |
| Season 2023 | Episode 1 | These Creatures Were Darwin's Greatest Enemy | 2023-01-10 | min |
| Season 2023 | Episode 2 | When Ancient People Changed Their Own DNA | 2023-01-19 | min |
| Season 2023 | Episode 3 | The Neandertal Burial That Taught Us About Humanity | 2023-01-31 | min |
| Season 2023 | Episode 4 | These Fossils Were Supposed To Be Impossible | 2023-02-07 | min |
| Season 2023 | Episode 5 | The Mystery Of The Mashed-Up Dinosaurs | 2023-02-14 | min |
| Season 2023 | Episode 6 | How a Mass Extinction Changed Our Brains | 2023-03-01 | min |
| Season 2023 | Episode 7 | That Time the American West Blew Up | 2023-03-07 | min |
| Season 2023 | Episode 8 | Does Our "Junk" DNA Make Us Human? | 2023-03-16 | min |
| Season 2023 | Episode 9 | Nautiloids Thrived For 500 Million Years Until These Guys Appeared | 2023-03-28 | min |
| Season 2023 | Episode 10 | The Real Story Of The Dodo Bird's (Current) Extinction | 2023-04-04 | min |
| Season 2023 | Episode 11 | How (Some) Plants Survived The K-Pg Extinction | 2023-04-13 | min |
| Season 2023 | Episode 12 | It's Becoming Very Clear That Birds Are Not Normal | 2023-04-25 | min |
| Season 2023 | Episode 13 | The Invisible Barrier Keeping Two Worlds Apart | 2023-05-02 | min |
| Season 2023 | Episode 14 | A Natural History of Mars | 2023-05-09 | min |
| Season 2023 | Episode 15 | We've Had The Giraffe's Neck All Wrong | 2023-08-01 | min |
| Season 2023 | Episode 16 | We Helped Make Mosquitoes A Problem | 2023-08-15 | min |
| Season 2023 | Episode 17 | Did a Tsunami Swallow Part of Europe? | 2023-08-29 | min |
| Season 2023 | Episode 18 | That Time The Ocean Lost (Almost) All Its Oxygen | 2023-09-12 | min |
| Season 2023 | Episode 19 | This Is An Ant World, We're Just Living In It | 2023-09-26 | min |
| Season 2023 | Episode 20 | Are Giant Animals Inevitable? | 2023-10-24 | min |
| Season 2023 | Episode 21 | When Did We Stop Being Naked? | 2023-11-09 | min |
| Season 2023 | Episode 22 | The Secret Extinctions Of The Silurian Period | 2023-11-21 | min |
| Season 2023 | Episode 23 | Beans & Bees (Not Bats) Gave Us Butterflies | 2023-12-05 | min |
| Season 2023 | Episode 24 | Why Only Earth Has Fire | 2023-12-19 | min |
| Season 2024 | Episode 1 | How Ancient Microbes Rode Bug Bits Out to Sea | 2024-01-09 | min |
| Season 2024 | Episode 2 | Our Most Mysterious Extinct Cousins | 2024-01-23 | min |
| Season 2024 | Episode 3 | Animals Might Be Much Older Than We Thought | 2024-02-06 | min |
| Season 2024 | Episode 4 | Why Is It So Hard to Tell the Sex of a Dinosaur? | 2024-02-20 | min |
| Season 2024 | Episode 5 | How Snake Venom Sparked An Evolutionary Arms Race | 2024-03-05 | min |
| Season 2024 | Episode 6 | When Did We Start Practicing Medicine? | 2024-03-19 | min |
| Season 2024 | Episode 7 | What Will Earth Be Like 300 Million Years From Now? | 2024-04-02 | min |
| Season 2024 | Episode 8 | The Hazy Evolution of Cannabis | 2024-04-16 | min |
| Season 2024 | Episode 9 | There's No Single Cradle of Humankind | 2024-04-30 | min |
| Season 2024 | Episode 10 | How Sponges Beat The First Mass Extinction | 2024-05-14 | min |
| Season 2024 | Episode 11 | When The Atlantic Ripped Open A Supercontinent | 2024-05-28 | min |
| Season 2024 | Episode 12 | When India Was An Island | 2024-08-06 | min |
| Season 2024 | Episode 13 | The Mystery of South America's False Horses | 2024-08-20 | min |
| Season 2024 | Episode 14 | What Was The First Beverage? | 2024-09-03 | min |
| Season 2024 | Episode 15 | How The Elephant Got Its Trunk | 2024-09-10 | min |
| Season 2024 | Episode 16 | When Earth "Ate" A Planet | 2024-09-25 | min |
| Season 2024 | Episode 17 | How the Himalayas Changed the World | 2024-10-08 | min |
| Season 2024 | Episode 18 | The Dinosaurs That Evolution Forgot | 2024-10-22 | min |
| Season 2024 | Episode 19 | What Happened To The Other Mesozoic Mammals? | 2024-11-05 | min |
| Season 2024 | Episode 20 | How Animals Got Butts | 2024-11-19 | min |
| Season 2024 | Episode 21 | When the Amazon Flowed Backwards | 2024-12-03 | min |
| Season 2024 | Episode 22 | When Neandertals Became Apex Predators | 2024-12-17 | min |
| Season 2025 | Episode 1 | Did Asteroids Spark Life? | 2025-01-14 | min |
| Season 2025 | Episode 2 | The Mystery of the Cretaceous Pompeii | 2025-01-28 | min |
| Season 2025 | Episode 3 | The Strange Primates That Thrived In The Mountains | 2025-02-11 | min |
| Season 2025 | Episode 4 | Why Wasn't There A Second Age of Reptiles? | 2025-02-25 | min |
| Season 2025 | Episode 5 | The Graveyard at the Center of the Earth | 2025-03-11 | min |
| Season 2025 | Episode 6 | The Arms Race That Made Insects Take Flight | 2025-03-25 | min |
| Season 2025 | Episode 7 | When Red Pandas Roamed North America | 2025-04-08 | min |
| Season 2025 | Episode 8 | The Rise and Fall of a Whale-Eating Sea Monster | 2025-04-22 | min |
| Season 2025 | Episode 9 | There's An Invisible Ocean Between These Fossils | 2025-05-06 | min |
| Season 2025 | Episode 10 | Darwin's Final Obsession | 2025-05-20 | min |
| Season 2025 | Episode 11 | The Dinosaurs Too Big To Be Dinosaurs | 2025-06-17 | min |
| Season 2025 | Episode 12 | Why Paleontologists Can't Stop Fighting About Spinosaurus | 2025-07-01 | min |
| Season 2025 | Episode 13 | How Dinosaur Extinction Gave Us Fruit | 2025-07-15 | min |
| Season 2025 | Episode 14 | When Dinosaurs Threw Up A Mystery | 2025-07-22 | min |
| Season 2025 | Episode 15 | That Time the Earth Was Sticky | 2025-09-09 | min |
| Season 2025 | Episode 16 | That Time Sharks Got Weird | 2025-09-23 | min |
| Season 2025 | Episode 17 | We're The Only Ones With Chins - And We Don't Know Why | 2025-10-07 | min |
| Season 2025 | Episode 18 | Crawling Out Of The Water Was An Evolutionary Accident | 2025-10-21 | min |
| Season 2025 | Episode 19 | How We Figured Out an Asteroid Killed the Dinosaurs | 2025-11-04 | min |
| Season 2025 | Episode 20 | How Chewing May Have Beat Extinction | 2025-11-18 | min |
