When Sharks Swam the Great Plains
Season 1 Episode 67 | 11m 45s
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.
Aired: 12/10/18Video has closed captioning.