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By Andrew Curry Jul. 22, 2020 , 11:00 AM
“If it is true people were in Zacatecas by 32,000 years ago, that changes everything—it more than doubles the time people have been in the Americas,” says Oregon State University, Corvallis, archaeologist Loren Davis, who was not part of the research team. But he remains skeptical, in part because he isn’t convinced the artifacts are tools. “I’m not going to say it’s impossible,” he says. “But if all they found are fractured rocks without any corroborating evidence, it’s natural to be skeptical.”
Loren Davis is a competent flintknapper, making him one of the more qualified people, so far, to comment on the rocks found at Chiquihuite Cave.
Dr. Davis has been excavating another claimed pre-Clovis site, Cooper's Ferry:
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The Cooper's Ferry site does have unequivocal artifacts, but it also has something in common with Chiquihuite Cave...no human DNA, no human teeth, no human hair, no human skulls, or soil contaminated with human DNA.