About the Authors

Meir M. Barak

Contributed equally to this work with: Meir M. Barak, Daniel E. Lieberman

barakm@winthrop.edu (MMB); danlieb@fas.harvard.edu (DEL)

Current address: Department of Biology, Winthrop University, Rock Hill, South Carolina, United States of America

Affiliations Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany, Department of Human Evolutionary Biology, Harvard University, Cambridge, Massachusetts, United States of America

Daniel E. Lieberman

Contributed equally to this work with: Meir M. Barak, Daniel E. Lieberman

barakm@winthrop.edu (MMB); danlieb@fas.harvard.edu (DEL)

Affiliation Department of Human Evolutionary Biology, Harvard University, Cambridge, Massachusetts, United States of America

David Raichlen

Affiliation School of Anthropology, University of Arizona, Tucson, Arizona, United States of America

Herman Pontzer

Affiliation Department of Anthropology, Hunter College, New York, New York, United States of America

Anna G. Warrener

Affiliation Department of Human Evolutionary Biology, Harvard University, Cambridge, Massachusetts, United States of America

Jean-Jacques Hublin

Affiliation Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: DEL MMB JJH. Performed the experiments: DEL MMB HP DR AGW. Analyzed the data: DEL MMB HP DR AGW. Contributed reagents/materials/analysis tools: DEL JJH HP DR. Wrote the paper: DEL MMB.