Bones of an adult mammoth and her calf have been uncovered at a 37,000-year-old butchering site in New Mexico, which suggest humans settled in North America 17,000 years than previously believed.A team of scientists, led by The University of Texas at Austin, extracted collagen from the bones, allowing them to carbon date the settled age of 36,250 to 38,900 years old.The bones were discovered in a three-foot-tall pile, with 95 percent belonging to the adult, and featured slaughter marks and fractures from blunt force impact
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