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.
Support Provided By
7:23
These animals truly ruled the Earth, becoming both abundant and diverse.
10:44
The key to solving the puzzle of Precambrian life was a tiny bit of fossilized fat.
9:11
The two viruses that we’ve had for millions of years.
9:31
The arrival of plants on land would eventually help cause a massive extinction event.
8:27
Cerro Ballena has over 40 skeletons of marine mammals from the Late Miocene Epoch.
7:59
Part of a secret to our success as a species has been our early experimentation with food.
11:09
Some rocks below the Great Unconformity are 1.2 billion years older than those above it.
9:21
It took thousands of years of interactions to develop our deep bond with dogs.
12:18
Is it possible that monsters that populate our legends were influenced by the fossil record?
10:09
Just a few thousand years ago, Madagascar was inhabited by giant lemurs.
