| Name | First Aired | Runtime | Image | |
|---|---|---|---|---|
| S2021E01 | What Happened to the World's Biggest Beaver? |
January 13, 2021
|
9 | |
| S2021E02 | The Reign of the Hell Ants |
January 21, 2021
|
11 | |
| S2021E03 | The Pandemic That Lasted 15 Million Years |
January 28, 2021
YouTube
|
10 | |
| S2021E04 | When We First Talked |
February 11, 2021
YouTube
|
12 | |
| S2021E05 | The Return of Giant Skin-Shell Sea Turtles |
February 17, 2021
YouTube
|
8 | |
| S2021E06 | The Genes We Lost Along the Way |
February 24, 2021
YouTube
|
13 | |
| S2021E07 | Our Bizarre, Possibly Venomous, Relative |
March 10, 2021
YouTube
|
9 | |
| S2021E08 | How Worm Holes Ended Wormworld |
March 18, 2021
YouTube
|
10 | |
| S2021E09 | How Humans Became (Mostly) Right-Handed |
March 24, 2021
YouTube
|
10 | |
| S2021E10 | How Chilis Got Spicy (and Why We Love the Burn) |
April 7, 2021
YouTube
|
10 | |
| S2021E11 | How To Survive the Little Ice Age |
April 20, 2021
YouTube
|
11 | |
| S2021E12 | When Crocs Thrived in the Seas |
April 29, 2021
YouTube
|
10 | |
| S2021E13 | When Trees Took Over the World |
May 12, 2021
YouTube
|
8 | |
| S2021E14 | How Weasels Got Skinny |
May 20, 2021
YouTube
|
10 | |
| S2021E15 | Where Are All The Squid Fossils? |
June 3, 2021
YouTube
|
8 | |
| S2021E16 | Did These Giant Sloths Poop Themselves to Death? |
July 14, 2021
YouTube
|
11 | |
| S2021E17 | The Traits That Spawned the Age of Mammals |
July 21, 2021
YouTube
|
8 | |
| S2021E18 | The Island of the Last Surviving Mammoths |
July 29, 2021
YouTube
|
9 | |
| S2021E19 | Where Are All the Medium-Sized Dinosaurs? |
August 12, 2021
YouTube
|
12 | |
| S2021E20 | How the Starfish Got Its Arms |
August 24, 2021
YouTube
|
12 | |
| S2021E21 | The Creature That Stumped Darwin |
September 1, 2021
YouTube
|
8 | |
| S2021E22 | How Pollination Got Going Twice |
September 16, 2021
YouTube
|
10 | |
| S2021E23 | How a Supervolcano Ignited an Evolutionary Debate |
September 23, 2021
YouTube
|
11 | |
| S2021E24 | How a Mass Extinction Event Created the Amazon |
September 29, 2021
YouTube
|
9 | |
| S2021E25 | When Mammals Only Went Out At Night |
October 7, 2021
YouTube
|
12 | |
| S2021E26 | How Ancient Whales May Have Changed the Deep Ocean |
October 21, 2021
YouTube
|
11 | |
| S2021E27 | How Dinosaurs Coupled Up |
October 28, 2021
YouTube
|
8 | |
| S2021E28 | When It Was Too Hot for Leaves |
November 17, 2021
YouTube
|
11 | |
| S2021E29 | Why The Paleo Diet Couldn't Save The Neanderthals |
December 2, 2021
YouTube
|
10 | |
| S2021E30 | The Fossil Record In Your Mouth |
December 9, 2021
YouTube
|
9 | |
| S2021E31 |
When Pterosaurs Walked
season finale
|
December 16, 2021
YouTube
|
11 |
No artwork of this type.
No artwork of this type.
No artwork of this type.