Eons

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: 12/10/18

Rating: NR

Video has closed captioning.

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