Handaxes: products of sexual selection?

@article{Kohn1999HandaxesPO,
  title={Handaxes: products of sexual selection?},
  author={Marek Kohn and Steven Mithen},
  journal={Antiquity},
  year={1999},
  volume={73},
  pages={518 - 526}
}
Why were handaxes made and why was their shape symmetrical and regular? These and many other questions are considered here, in a paper tackling hominid social behaviour and sexual selection. 
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