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#1
May 13th, 2008, 07:04 AM
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Earth Extinctions Blamed on Cosmic Speed Bump
(SPACE.com)
SPACE.com - The sun bounces up and down as it roams the Milky Way, and such
wavering might have hurled showers of comets Earth's way that caused mass extinctions, including the one that killed the dinosaurs, a new study claims. View the Entire Article
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