'Nanodiamond' discovery points to species-destroying collision 13,000 years ago
(Newser) -
Newly discovered microscopic diamonds suggest that a comet crashed into North America 13,000 years ago, triggering devastating floods and fires that killed 35 species and wiped out human communities, reports the
Los Angeles Times. Layers of "nanodiamonds," found in a number of regions in the country, were...
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