Artifacts upend theory on first North Americans

A cache of 15,500-year-old artifacts found buried in a Texas flood plain predates the well-known Clovis people, long thought to be the first inhabitants of the New World.A massive cache of 15,500-year-old artifacts from a Texas flood plain is providing what archaeologists are calling the first unequivocal evidence that the people of the well-known Clovis culture, long thought to be the first humans to inhabit North America, were not.

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