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The Return of Giant Skin-Shell Sea Turtles

The biggest turtle ever described wasn’t an ancestor of today’s leatherback turtles or any other living sea turtles. But it looks like there are some things about being a giant, skin-shelled sea turtle that just work, no matter where, or when, you lived.
Season 3 Episode 35 Length 06:53 Premiere: 02/17/21

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Season 3 Episodes

Where Are All The Squid Fossils?
S3 E45 Length 07:21 Premiere Date 06/03/21

How Weasels Got Skinny
S3 E44 Length 09:01 Premiere Date 05/18/21

When Trees Took Over the World
S3 E43 Length 07:28 Premiere Date 05/12/21

How To Survive the Little Ice Age
S3 E42 Length 10:00 Premiere Date 04/20/21

When Crocs Thrived in the Seas
S3 E41 Length 09:08 Premiere Date 04/27/21

How Chilis Got Spicy (and Why We Love the Burn)
S3 E40 Length 09:32 Premiere Date 04/06/21

How Humans Became (Mostly) Right-Handed
S3 E39 Length 08:36 Premiere Date 03/24/21

How Worm Holes Ended Wormworld
S3 E38 Length 09:42 Premiere Date 03/18/21

Our Bizarre, Possibly Venomous, Relative
S3 E37 Length 08:11 Premiere Date 03/10/21

The Genes We Lost Along the Way
S3 E36 Length 12:01 Premiere Date 02/24/21

The Return of Giant Skin-Shell Sea Turtles
S3 E35 Length 06:53 Premiere Date 02/17/21

When We First Talked
S3 E34 Length 11:13 Premiere Date 02/11/21

The Pandemic That Lasted 15 Million Years
S3 E33 Length 09:20 Premiere Date 01/28/21

The Reign of the Hell Ants
S3 E32 Length 10:09 Premiere Date 01/21/21

The Bear-Sized Beaver That Couldn’t Build A Dam
S3 E31 Length 07:32 Premiere Date 01/13/21

The Triassic Reptile With "Two Faces"
S3 E30 Length 10:11 Premiere Date 12/22/20

When the Earth Suddenly Stopped Warming
S3 E29 Length 10:21 Premiere Date 12/17/20

When Lizards Took Over the World
S3 E28 Length 08:29 Premiere Date 12/09/20

How Humans Lost Their Fur
S3 E27 Length 11:27 Premiere Date 12/02/20

The Rise and Fall of the Tallest Mammal to Walk the Earth
S3 E26 Length 07:53 Premiere Date 11/17/20

How Plankton Created A Bizarre Giant of the Seas
S3 E25 Length 08:48 Premiere Date 11/10/20

Why Do Things Keep Evolving Into Crabs?
S3 E24 Length 06:46 Premiere Date 10/28/20

How Ankylosaurs Got Their Clubs
S3 E23 Length 07:52 Premiere Date 10/13/20

How Plants Became Carnivores
S3 E22 Length 09:48 Premiere Date 10/07/20

What Happened To Primates In North America?
S3 E21 Length 08:54 Premiere Date 09/30/20

Why Did These Ancient Gophers Have Horns?
S3 E20 Length 08:23 Premiere Date 09/15/20

The Sea Monster from the Andes
S3 E19 Length 06:27 Premiere Date 09/10/20

How Ancient Art Captured Australian Megafauna
S3 E18 Length 09:43 Premiere Date 09/02/20

The Oddest Couple in the Fossil Record
S3 E17 Length 08:48 Premiere Date 08/20/20

How We Figured Out Fermentation
S3 E16 Length 09:20 Premiere Date 08/13/20

The Dinosaur Who Was Buried at Sea
S3 E15 Length 12:11 Premiere Date 08/05/20

The Biggest Frog that Ever Lived
S3 E14 Length 07:05 Premiere Date 07/23/20

The Story of the Dino Stampede
S3 E13 Length 10:43 Premiere Date 07/16/20

How the Walrus Got Its Tusks
S3 E12 Length 07:42 Premiere Date 07/29/20

When Dinosaurs Chilled in the Arctic
S3 E11 Length 09:20 Premiere Date 07/29/20

The World Before Plate Tectonics
S3 E10 Length 09:24 Premiere Date 07/29/20

When Dinosaur Look-Alikes Ruled the Earth
S3 E9 Length 07:23 Premiere Date 07/29/20

How We Identified One of Earth’s Earliest Animals
S3 E8 Length 10:44 Premiere Date 07/29/20

The Two Viruses That We’ve Had For Millions of Years
S3 E7 Length 09:11 Premiere Date 05/28/20

How Plants Caused the First Mass Extinction
S3 E6 Length 09:31 Premiere Date 05/28/20

How the Andes Mountains Might Have Killed a Bunch of Whales
S3 E5 Length 08:27 Premiere Date 05/07/20

The Risky Paleo Diets of Our Ancestors
S3 E4 Length 07:59 Premiere Date 05/07/20

When a Billion Years Disappeared
S3 E3 Length 11:09 Premiere Date 05/07/20

How Dogs (Eventually) Became Our Best Friends
S3 E2 Length 09:21 Premiere Date 04/09/20

How the Egg Came First
S3 E1 Length 08:44 Premiere Date 04/09/20

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