Cuts on a bone of a mysterious human relative suggest they were butchered and likely eaten by one of their own 1.5 million years ago, revealing the oldest evidence of cannibalism.Researchers from the Smithsonian's National Museum of Natural History found the markings on the left tibia from a relative of Homo sapiens that lived in what is now Kenya.Approximately nine of the 11 cuts match the type inflicted by stone tools, while a now-extinct saber-tooth-like animal was responsible for the others.
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