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When Sharks Swam the Great Plains
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Season 1
Episode 68
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When Sharks Swam the Great Plains

Season: 1
Eps: 67

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.

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