Skip to main content

When sharks swam the Great Plains

2,236,809 Views

13 Questions Answered

Best of Web

Let’s Begin…

If you’ve ever been to, 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.

What was the Western Interior Seaway, and when did it exist?

About TED-Ed Best of Web

TED-Ed Best of Web are exceptional, user-created lessons that are carefully selected by volunteer teachers and TED-Ed staff.

Meet The Creators

  • Video created by PBS Eons
  • Lesson Plan created by Luka Seamus Wright