Archaeology: Tools go back in time

@article{Hovers2015ArchaeologyTG,
  title={Archaeology: Tools go back in time},
  author={Erella Hovers},
  journal={Nature},
  year={2015},
  volume={521},
  pages={294-295}
}
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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