Eons
S2 · E22 — When Fish First Breathed Air
S2:E22 · When Fish First Breathed Air
45 episodes in this season
How Two Microbes Changed History
10 min
The Time Terror Birds Invaded
Untangling the Devil's Corkscrew
The Great Snake Debate
The Whole Saga of the Supercontinents
From the Cambrian Explosion to the Great Dying
How Sex Became a Thing
The Other Explosion You Should Know About
How the Turtle Got Its Shell
What a Dinosaur Looks Like Under a Microscope
The Most Useful Fossils in the World
Inside the Dinosaur Library
What Was the Ancestor of Everything?
How the Squid Lost Its Shell
How the Chalicothere Split In Two
The Age of Reptiles in Three Acts
The Weird, Watery Tale of Spinosaurus
From the Fall of Dinos to the Rise of Humans
That Time It Rained for Two Million Years
Why Triassic Animals Were Just the Weirdest
Where Did Viruses Come From?
When Fish First Breathed Air
How the T-Rex Lost Its Arms
FAQs From Our First Year
When Insects First Flew
The Mystery of the Eocene’s Lethal Lake
When Fish Wore Armor
When Birds Had Teeth
How Horses Took Over North America (Twice)
How a Supervolcano Made the Cenozoic’s Coolest Fossils
The Rise and Fall of the Bone-Crushing Dogs
Life, Sex & Death Among the Dire Wolves
When We First Walked
Did Raptorex Really Exist?
Can We Get DNA From Fossils?
When Giant Amphibians Reigned
Your Place in the Primate Family Tree
The Two People We're All Related To
When Rodents Rafted Across the Ocean
When Birds Stopped Flying
When Camels Roamed North America
How Sloths Went From the Seas to the Trees
When Sharks Swam the Great Plains
When Apes Conquered Europe
Why Megalodon (Definitely) Went Extinct
