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