
Eons
When Sharks Swam the Great Plains
TV-Y7
S2 • E43 Dec 4, 2018 10mIf 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.
