The finding of 3.3-million-year-old stone flints, cores, hammers and anvils in Kenya suggests that the first stone tools were made by human ancestors that pre-dated the earliest known members of the genus Homo. See Article p.310
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Hovers, E. Tools go back in time. Nature 521, 294–295 (2015). https://doi.org/10.1038/521294a
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DOI: https://doi.org/10.1038/521294a
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