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.
8:36
How did such a large predator survive?
9:41
How did a relative of the red panda end up in North America?
8:10
How did the competition of spiders vs insects drive them both into the air?
12:38
Why plate tectonics don't make sense.
9:59
Why was it the mammals who triumphed?
10:09
What do mountains reveal about primates?
10:39
When you take a deeper look at Pompeii, a different story could be told about the final moments.
10:38
We may have planet-shattering asteroids...
11:50
What doomed the Neandertals?
11:25
What did life look like when the Amazon watershed flowed backwards?
12:10
Did you know the evolution of the butthole was a major breakthrough in animal development?
12:28
Learn about the complicated the history of mammals and their disappearance.