National Geographic Channel Naked Science

Season 4 Episode 12

Comet Mysteries

Aired Thursday 8:00 PM Aug 09, 2007 on National Geographic
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Episode Summary

Comet Mysteries
This episode examines the chances of a comet hitting Earth again. It's happened before many times, once even wiping out the dinosaurs. How astronomers could spot new ones as they barrel through space is shown. The question remains, how could they could they stop one even if they find it?moreless

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