APR 09, 2015 8:53 PM PDT

Extinction Level Event

WRITTEN BY: Andrew J. Dunlop
An artist's depiction of a 6-mile wide asteroid that impacted the Earth 65 million years ago

Over 65 million years ago, when a 6-mile wide asteroid slammed into the earth with the force of a billion atomic bombs, it left a crater 110 miles wide.
About the Author
Andrew J. Dunlop lives and writes in a little town near Boston. He's interested in space, the Earth, and the way that humans and other species live on it.
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