Ancient stone tools suggest first people arrived in America earlier than thought https://www.bbc.com/news/science-env...bxE_74knaB4_KY
https://www.nbcnews.com/science/scie...R_N0MnFWFkCd68
ancient US inhabitants
https://www.nbcnews.com/science/scie...R_N0MnFWFkCd68
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