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The Time Terror Birds Invaded

The Time Terror Birds Invaded

Season 1 Episode 26
5:32
Untangling the Devil's Corkscrew

Untangling the Devil's Corkscrew

Season 1 Episode 27
6:11
The Great Snake Debate

The Great Snake Debate

Season 1 Episode 28
6:28
The Whole Saga of the Supercontinents

The Whole Saga of the Supercontinents

Season 1 Episode 29
8:40
How Sex Became A Thing

How Sex Became A Thing

Season 1 Episode 31
5:39
How the Turtle Got Its Shell

How the Turtle Got Its Shell

Season 1 Episode 33
8:29
The Most Useful Fossils In The World

The Most Useful Fossils In The World

Season 1 Episode 35
5:49
Inside the Dinosaur Library

Inside the Dinosaur Library

Season 1 Episode 36
7:19
What Was the Ancestor of Everything?

What Was the Ancestor of Everything?

Season 1 Episode 37
11:06
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Eons

How Two Microbes Changed History

Season 1 Episode 25

What if I told you that, more than two billion years ago, some tiny living thing started to live inside another living thing … and never left? And now, the descendants of both of those things are in you?