Day the Dinosaurs Died Preview

Preview: Season 44 Episode 21 | 30s

66 million years ago, a seven-mile-wide asteroid collided with Earth, triggering a chain of events that coincide with the end of the dinosaurs. But experts have long debated exactly what happened when the asteroid struck and how the giant beasts met their end. Now, scientists have uncovered compelling new clues about the catastrophe.

Aired: 12/06/17

Rating: NR

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