8 years ago
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The Chilling Regularity of Mass Extinctions
Scientists say new evidence supports a 26-million-year cycle linking comet showers and global die-offs.
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http://www.theatlantic.com
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I've read about this several years ago. As we hurtle through space, we must go through areas of debris. The first time I ever read about it was from Graham Hancock's Fingerprints of the Gods. Admittedly not a scientific publication, but it is an interesting read. Thought provoking.