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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. Read »
Created by pooja1439 Created 28 weeks 6 days ago – Made popular 28 weeks 6 days ago
Category: Science
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