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Extraterrestrial Markers Found at Clovis Sites Across North America
Extraterrestrial Markers Found at Clovis Sites Across North America
2007
Alfred P. West
R. B. Firestone
James P. Kennett
Luann Becker
Keywords:
Younger Dryas
Younger Dryas impact hypothesis
Extraterrestrial life
Geomorphology
Climatology
Geology
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