Older than the Oldowan? Rethinking the emergence of hominin tool use

@article{Panger2003OlderTT,
  title={Older than the Oldowan? Rethinking the emergence of hominin tool use},
  author={Melissa A. Panger and Alison S Brooks and Brian G. Richmond and Bernard A. Wood},
  journal={Evolutionary Anthropology: Issues},
  year={2003},
  volume={11}
}
Using information from primatology, functional morphology, phylogeny, archeology, and paleoanthropology, we argue that before 2.5 mya hominins may have used tools, including unmodified and possibly modified stone tools (Fig. 1). We consider several scenarios to explain why stone tool manufacture and use might not have left archeological traces prior to 2.5 mya and conclude by suggesting means to test our hypotheses. 
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