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The Hellacious Lives of the "Hell Pigs"

The Hellacious Lives of the "Hell Pigs"

Season 2 Episode 24
7:17
How Evolution Works (And How We Figured It Out)

How Evolution Works (And How We Figured It Out)

Season 2 Episode 25
12:09
When the Synapsids Struck Back

When the Synapsids Struck Back

Season 2 Episode 26
10:10
When Ichthyosaurs Led a Revolution in the Seas

When Ichthyosaurs Led a Revolution in the Seas

Season 2 Episode 27
9:38
When We Met Other Human Species

When We Met Other Human Species

Season 2 Episode 28
12:56
How Volcanoes Froze the Earth...Twice

How Volcanoes Froze the Earth...Twice

Season 2 Episode 29
10:29
How Earth's First, Unkillable Animals Saved the World

How Earth's First, Unkillable Animals Saved the World

Season 2 Episode 30
10:12
When Giant Deer Roamed Eurasia

When Giant Deer Roamed Eurasia

Season 2 Episode 31
6:53
Was This Dinosaur a Cannibal?

Was This Dinosaur a Cannibal?

Season 2 Episode 32
10:37
The Missing Link That Wasn’t

The Missing Link That Wasn’t

Season 2 Episode 33
9:54
The Raptor That Made Us Rethink Dinosaurs

The Raptor That Made Us Rethink Dinosaurs

Season 2 Episode 34
8:35
When Bats Took Flight

When Bats Took Flight

Season 2 Episode 35
11:09
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Eons

The History of Climate Cycles (and the Woolly Rhino)

Season 2 Episode 23

Throughout the Pleistocene Epoch, the range of the woolly rhino grew and shrank in sync with global climate. So what caused the climate -- and the range of the woolly rhino -- to cycle back and forth between such extremes?
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