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Supernova theory ties Clovis era to lunar-like particles
Scientist Richard Firestone argued at a Columbia conference that magnetic particles rich in titanium and uranium found at Clovis sites and on mammoth tusks resemble lunar rocks, suggesting comets may have struck Earth about 13 000 years ago and influenced early life. An archaeologist noted earlier North American human presence may predate previous estimates, citing Topper site findings.
MENTIONED IN THIS ARTICLE
Columbia
Richard Firestone
Clovis
Gainey
Mich
Lawrence Berkeley National Laboratory
Moon
Earth
Firestone
Solar System
Richard Callaway
Callaway
Atlanta
Topper
Allendale County
University of South Carolina
al Goodyear
North America
Goodyear