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Wild monkeys flake stone tools

Nature volume 539, pages 8588 (03 November 2016) | Download Citation

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Abstract

Our understanding of the emergence of technology shapes how we view the origins of humanity1,2. Sharp-edged stone flakes, struck from larger cores, are the primary evidence for the earliest stone technology3. Here we show that wild bearded capuchin monkeys (Sapajus libidinosus) in Brazil deliberately break stones, unintentionally producing recurrent, conchoidally fractured, sharp-edged flakes and cores that have the characteristics and morphology of intentionally produced hominin tools. The production of archaeologically visible cores and flakes is therefore no longer unique to the human lineage, providing a comparative perspective on the emergence of lithic technology. This discovery adds an additional dimension to interpretations of the human Palaeolithic record, the possible function of early stone tools, and the cognitive requirements for the emergence of stone flaking.

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Change history

  • 15 December 2016

    Extended Data Table 2 was replaced, to include the missing five final lines.

References

  1. 1.

    Olduvai Gorge, Vol. 3. Excavations in Beds I and II, 1960–1963. (Cambridge University Press, 1971)

  2. 2.

    Early hominid activities at Olduvai. (AldineTransaction, 1988)

  3. 3.

    et al. 3.3-million-year-old stone tools from Lomekwi 3, West Turkana, Kenya. Nature 521, 310–315 (2015)

  4. 4.

    , , & Older than the Oldowan? Rethinking the emergence of hominin tool use. Evol. Anthr. 11, 235–245 (2002)

  5. 5.

    Early hominids in action: a commentary on the contribution of archaeology to understand the fossil record in East Africa for 1975. Yrbk. Phys. Anthr. 19–35 (1976)

  6. 6.

    The Oldowan reassessed: a close look at early stone artifacts. J. Archaeol. Sci. 12, 101–120 (1985)

  7. 7.

    & Late Pliocene hominid knapping skills: the case of Lokalalei 2C, West Turkana, Kenya. J. Hum. Evol. 48, 435–472 (2005)

  8. 8.

    The world’s oldest stone artefacts from Gona, Ethiopia: their implications for understanding stone technology and patterns of human evolution between 2·6–1·5 million years ago. J. Archaeol. Sci. 27, 1197–1214 (2000)

  9. 9.

    , , & Technological variation in the earliest Oldowan from Gona, Afar, Ethiopia. J. Hum. Evol. 58, 474–491 (2010)

  10. 10.

    Omo revisited: evaluating the technological skills of Pliocene hominids. Curr. Anthropol. 45, 439–465 (2004)

  11. 11.

    & An earlier origin for stone tool making: implications for cognitive evolution and the transition to Homo. Phil. Trans. R. Soc. B 371, 20150233 (2016)

  12. 12.

    et al. A new late Pleistocene archaeological sequence in South America: the Vale da Pedra Furada (Piauí, Brazil). Antiquity 88, 927–941 (2014)

  13. 13.

    , & The Chimpanzees of Bossou and Nimba. (Springer Science & Business Media, 2011)

  14. 14.

    , & Excavation of a chimpanzee stone tool site in the African rainforest. Science 296, 1452–1455 (2002)

  15. 15.

    Chimpanzee Material Culture: Implications for Human Evolution. (Cambridge Univ. Press, 1992)

  16. 16.

    et al. 4,300-year-old chimpanzee sites and the origins of percussive stone technology. Proc. Natl Acad. Sci. USA 104, 3043–3048 (2007)

  17. 17.

    in Stone Knapping: The Necessary Conditions for a Uniquely Hominid Behaviour. (eds & ) 23–33 (McDonald Institute monograph series, 2005)

  18. 18.

    , & in The Oldowan: Case Studies into the Earliest Stone Age (eds & ) 155–222 (Stone Age Institute Press, 2006)

  19. 19.

    & The manifold use of pounding stone tools by wild capuchin monkeys of Serra da Capivara National Park, Brazil. Behaviour 153, 421–442 (2016)

  20. 20.

    & The enhanced tool-kit of two groups of wild bearded capuchin monkeys in the Caatinga: tool making, associative use, and secondary tools. Am. J. Primatol. 71, 242–251 (2009)

  21. 21.

    & Stone throwing as a sexual display in wild female bearded capuchin monkeys, Sapajus libidinosus. PLoS One 8, e79535 (2013)

  22. 22.

    , & Complexity in object manipulation by Japanese macaques (Macaca fuscata): a cross-sectional analysis of manual coordination in stone handling patterns. J. Comp. Psychol. 125, 61–71 (2011)

  23. 23.

    Stone banging by wild capuchin monkeys: an unusual auditory display. Folia Primatol. (Basel) 78, 36–45 (2007)

  24. 24.

    Silicon as an essential trace element in animal nutrition. Silicon Biochem. 703, 123–139 (2008)

  25. 25.

    Koobi Fora Research Project Vol. 5: Plio-Pleistocene Archaeology. (Clarendon, 1997)

  26. 26.

    et al. Pre-Columbian monkey tools. Curr. Biol. 26, R521–R522 (2016)

  27. 27.

    Towards a prehistory of primates. Antiquity 86, 299–315 (2012)

  28. 28.

    Evidence in hand: recent discoveries and the early evolution of human manual manipulation. Phil. Trans. R. Soc. B 370, 20150105 (2015)

  29. 29.

    in Stone Tools and the Evolution of Human Cognition. (eds & ) 45–65 (Univ. Press of Colorado, 2010)

  30. 30.

    et al. Evidence for stone-tool-assisted consumption of animal tissues before 3.39 million years ago at Dikika, Ethiopia. Nature 466, 857–860 (2010)

  31. 31.

    , & Os Biomad e as Sociedades Huanas na Pre-Historia da Regiao do Parque nacional Serra da Capivara, Brasil. Volume II A–B. (Fundação Museu Do Homem Americano—Fumdham, Ipsis Gráfica E Editora, 2014)

  32. 32.

    , & Technology and Terminology of Knapped Stone: Followed by a Multilingual Vocabulary Arabic, English, French, German, Greek, Italian, Portuguese, Spanish. 5, (Cercle de Recherches et d’Etudes Préhistoriques, 1999)

  33. 33.

    & Technological Strategies in the Lower Pleistocene at Olduvai Beds I & II. (Univ. Liège press, ERAUL, 2005)

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Acknowledgements

The study was funded by a European Research Council Starting Investigator Grant (#283959) to M.H. and São Paulo Research Foundation (FAPESP) awards to T.F. (#2013/05219-0) and E.B.O. (#2014/04818-0). Support for fieldwork and analysis was provided by N. Guidon and G. Daltrini Felice of FUMDHAM and University College London (ERC Starting Grant #283366). We thank R. Fonseca de Oliveira for excavation coordination, M. Gumert, R. Mora and A. Arroyo for comments, and A. Theodoropoulou for artefact illustrations. Fieldwork at SCNP was approved by Brazilian environmental protection agencies (IBAMA/ICMBio 37615-2).

Author information

Author notes

    • Tomos Proffitt
    •  & Lydia V. Luncz

    These authors contributed equally to this work.

Affiliations

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

    • Tomos Proffitt
    • , Lydia V. Luncz
    •  & Michael Haslam
  2. Institute of Psychology, University of São Paulo, São Paulo, SP 05508-030, Brazil

    • Tiago Falótico
    •  & Eduardo B. Ottoni
  3. Institute of Archaeology, University College London, 31–34 Gordon Square, London WC1H 0PY, UK

    • Ignacio de la Torre

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Contributions

M.H. and T.F. observed and recorded the capuchin behaviour, collected lithic material and directed excavations at Serra da Capivara National Park. T.P. conducted the technological analysis. T.P., L.V.L., I.D.L.T. and M.H. discussed the implications of the results. T.P. wrote the paper and supplementary online content with contributions from L.V.L., T.F., E.B.O., I.D.L.T. and M.H. T.P generated all figures models and video content, using data recorded by M.H. and T.P.

Competing interests

The authors declare no competing financial interests.

Corresponding authors

Correspondence to Tomos Proffitt or Michael Haslam.

Reviewer Information Nature thanks S. Carvalho and H. Roche for their contribution to the peer review of this work.

Extended data

Supplementary information

PDF files

  1. 1.

    Supplementary Information

    This file contains technological analysis of capuchin stone on stone percussive tools and Supplementary References.

Videos

  1. 1.

    Video footage of stone on stone percussive behaviour in wild capuchins, Serra da Capivara National Park

    Time stamp 00:10 – Use of quartzite hammerstone refitted in Refit Set 6. Time stamp 00:19 and 02:30 – Examples of hammerstone fracture during use. Time stamp 03:09 – Placement of detached flake on a passive hammer in a behaviour closely resembling hominin bipolar knapping.

  2. 2.

    Capuchin stone on stone assemblage, Serra da Capivara National Park

    Video of 3D model and reconstruction of reduction sequence for Refit Set 6, indicating the recurrent detachment of invasive flakes from a single hammerstone and examples of other flaked hammerstones and flakes.

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DOI

https://doi.org/10.1038/nature20112

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