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How Horses Went From Food To Friends

How Horses Went From Food To Friends

Season 4 Episode 21
6:32
Why We Only Have Ten Toes (It's a Long Story)

Why We Only Have Ten Toes (It's a Long Story)

Season 4 Episode 22
9:12
When a Giant Pterosaur Ruled the European Islands

When a Giant Pterosaur Ruled the European Islands

Season 4 Episode 23
8:50
The Sudden Rise of the First Colossal Animal

The Sudden Rise of the First Colossal Animal

Season 4 Episode 24
8:44
The Extreme Hyenas That Didn't Last

The Extreme Hyenas That Didn't Last

Season 4 Episode 25
7:50
How the Smallest Animal Got So Simple

How the Smallest Animal Got So Simple

Season 4 Episode 26
6:52
Why Sour May Be The Oldest Taste

Why Sour May Be The Oldest Taste

Season 4 Episode 27
7:02
The Ancient Human Species With A Missing Body

The Ancient Human Species With A Missing Body

Season 4 Episode 28
7:56
When Ants Domesticated Fungi

When Ants Domesticated Fungi

Season 4 Episode 29
9:05
The Curious Case of the Cave Lion

The Curious Case of the Cave Lion

Season 4 Episode 30
8:09
Is This The Oldest Dad In The Fossil Record?

Is This The Oldest Dad In The Fossil Record?

Season 4 Episode 31
6:37
We Can “Bring Back” The Woolly Mammoth. Should We?

We Can “Bring Back” The Woolly Mammoth. Should We?

Season 4 Episode 32
6:40
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Eons

How Vertebrates Got Teeth... And Lost Them Again

Season 4 Episode 20

As revolutionary as teeth were, they would go on to disappear in some groups of vertebrates. But why?
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