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Behavioral Assessment of Manual Dexterity in Non-Human Primates
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Wild monkeys flake stone tools.

Tomos Proffitt1, Lydia V Luncz1, Tiago Falótico2

  • 1Primate Archaeology Research Group, School of Archaeology, University of Oxford, Dyson Perrins Building, South Parks Road, Oxford OX1 3QY, UK.

Nature
|November 4, 2016
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Summary
This summary is machine-generated.

Wild capuchin monkeys in Brazil unintentionally create sharp stone flakes and cores. This discovery challenges the idea that stone tool production is unique to human evolution, offering new insights into early technology.

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Area of Science:

  • Primate Behavior
  • Archaeology
  • Paleoanthropology

Background:

  • Stone technology is central to understanding human origins.
  • Early hominin tools are primarily identified as sharp-edged stone flakes and cores.

Purpose of the Study:

  • To investigate non-human primate stone-breaking behavior.
  • To compare monkey-produced stone artifacts with early hominin tools.

Main Methods:

  • Observation of wild bearded capuchin monkeys (Sapajus libidinosus) in Brazil.
  • Analysis of the morphology and fracture patterns of stones broken by monkeys.

Main Results:

  • Monkeys deliberately break stones, producing recurrent, conchoidally fractured, sharp-edged flakes and cores.
  • These artifacts share characteristics with intentionally produced hominin tools.

Conclusions:

  • Stone artifact production is not exclusive to the human lineage.
  • This finding provides a comparative model for the emergence of lithic technology.
  • Re-evaluates interpretations of the Palaeolithic record, early tool function, and cognitive prerequisites for stone flaking.