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Eons
When Sharks Swam the Great Plains
Season 2
Episode 5
If you’ve ever been to, or lived in, or even flown over the central swath of North America, then you’ve seen the remnants of what was a uniquely fascinating environment. Scientists call it the Western Interior Seaway, and at its greatest extent, it ran from the Caribbean Sea to the Canadian Arctic.
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The Paleozoic Era is one of the most chaotic times in Earth's history. Find out why!
8:40
So if we want to know how we got here, we have to understand how "here" got here.
6:11
In the late 1800s, paleontologists in Nebraska found huge coils of hardened sand.
5:32
5 million years ago, a predator made its way onto the coastal plains of North America.
7:39
More than two billion years ago, a tiny living thing started to live inside another thing.
6:37
An unlikely group of pioneers ultimately made life on land possible -- the fungi.
9:54
Imagine an enormous, lush rainforest teeming with life...in the Arctic.
10:01
Dinosaurs have been found with some sort of fluff or even full-on plumage.
