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When a Tiny Land Bridge Triggered an Ice Age

On land, the Isthmus of Panama kicked off possibly the greatest natural experiment in the history of life on Earth. In the water, this narrow strip of land did something completely different: it divided. And that division would have a much bigger effect on the planet than the land connection ever did.
Season 8 Episode 8 Length 10:27 Premiere: 12/17/25

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Season 8 Episodes

The Fiery Rise of Flowering Plants
S8 E11 Length 10:45 Premiere Date 02/10/26

When Ancient Weeds Fooled Us
S8 E10 Length 11:37 Premiere Date 01/27/26

How Brawn Led to Brains
S8 E9 Length 12:14 Premiere Date 01/13/26

When a Tiny Land Bridge Triggered an Ice Age
S8 E8 Length 10:27 Premiere Date 12/17/25

What Was Greenland Like When it Was Green
S8 E7 Length 09:07 Premiere Date 12/02/25

How Chewing May Have Beat Extinction
S8 E6 Length 09:35 Premiere Date 11/18/25

How We Figured Out an Asteroid Killed the Dinosaurs
S8 E5 Length 10:43 Premiere Date 11/04/25

Crawling Out Of The Water Was An Evolutionary Accident
S8 E4 Length 08:19 Premiere Date 10/21/25

Do Chins Make Us Human?
S8 E3 Length 12:07 Premiere Date 10/07/25

The Golden Age of Sharks
S8 E2 Length 12:40 Premiere Date 09/23/25

That Time Earth was Sticky
S8 E1 Length 10:45 Premiere Date 09/09/25

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