Podknife - Earth Was Longtime Asteroid Punching Bag by 60-Second Space

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Earth Was Longtime Asteroid Punching Bag

Podcast |: 60-Second Space
Publisher |: Scientific American
Media Type |: audio
Podknife tags |: Astronomy,; Natural Sciences,; Science & Medicine,; Technology
Categories Via RSS |: Science & Medicine,; Society & Culture,; Technology
Publication Date |: May 01, 2012
Episode Duration |: 00:01:15

Dozens of asteroid impacts at least as bad as the dinosaur killer occurred long after such impacts were previously thought to have petered out. John Matson reports

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