Season 2021
Episodes
1 What Happened to the World's Biggest Beaver? Jan 13, 2021 
2 The Reign of the Hell Ants Jan 21, 2021 
3 The Pandemic That Lasted 15 Million Years Jan 28, 2021 
4 When We First Talked Feb 11, 2021 
5 The Return of Giant Skin-Shell Sea Turtles Feb 17, 2021 
6 The Genes We Lost Along the Way Feb 24, 2021 
7 Our Bizarre, Possibly Venomous, Relative Mar 10, 2021 
8 How Worm Holes Ended Wormworld Mar 18, 2021 
9 How Humans Became (Mostly) Right-Handed Mar 24, 2021 10 How Chilis Got Spicy (and Why We Love the Burn) Apr 7, 2021 11 How To Survive the Little Ice Age Apr 20, 2021 12 When Crocs Thrived in the Seas Apr 29, 2021 13 When Trees Took Over the World May 12, 2021 14 How Weasels Got Skinny May 20, 2021 15 Where Are All The Squid Fossils? Jun 3, 2021 16 Did These Giant Sloths Poop Themselves to Death? Jul 14, 2021 17 The Traits That Spawned the Age of Mammals Jul 21, 2021 18 The Island of the Last Surviving Mammoths Jul 29, 2021 19 Where Are All the Medium-Sized Dinosaurs? Aug 12, 2021 20 How the Starfish Got Its Arms Aug 24, 2021 21 The Creature That Stumped Darwin Sep 1, 2021 22 How Pollination Got Going Twice Sep 16, 2021 23 How a Supervolcano Ignited an Evolutionary Debate Sep 23, 2021 24 How a Mass Extinction Event Created the Amazon Sep 29, 2021 25 When Mammals Only Went Out At Night Oct 7, 2021 
26 How Ancient Whales May Have Changed the Deep Ocean Oct 21, 2021 27 How Dinosaurs Coupled Up Oct 28, 2021 28 When It Was Too Hot for Leaves Nov 17, 2021 29 Why The Paleo Diet Couldn't Save The Neanderthals Dec 2, 2021 30 The Fossil Record In Your Mouth Dec 9, 2021 31 When Pterosaurs Walked Dec 16, 2021