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#523127
Wed 18 Sep 2019 06:44:PM
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Joined: Feb 2001
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Launch Director
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The cataclysmic asteroid impact off Mexico's coast that doomed the dinosaurs 66 million years ago was not the only time an astronomical event shaped the history of life on Earth.  Source: Distant asteroid calamity shaped life on Earth 466 million years ago
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Distant asteroid calamity shaped life on Earth 466 million years ago
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Wed 18 Sep 2019 06:44:PM
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