Up Next
Back to Show
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.
Sign up now for inspiring and thought-provoking media delivered straight to your inbox.
Support Provided By
6:37
Diictodon used burrows to breed and a male parent may have stayed behind to feed it.
8:09
Large feline roamed Eurasia and Its fossils have been found across the continent.
9:05
Ants have been farming for 60 million years! We explore how, when and why they started.
7:56
Would it really be impossible for us to reconstruct their morphology?
7:02
Sour used to be the taste of danger. But, now its role has reversed.
6:52
This tiny, simple animal, the Myxozoans, evolved from something bigger and more complex.
7:50
Only a few million years ago, Hyenas lived very different lives from what we know today.
8:44
A truly enormous ichthyosaur reached its size within just a few million years.
8:50
The giant pterosaur's occupied the empty Hateg Island.
9:12
We learn why all mammals today, from humans to bats, have five fingers or fewer.
6:32
With evidence from from art, archaeology, and ancient DNA, we put together horses history.
8:52
Here's why teeth would go on to disappear in some groups of vertebrate.