About the Authors

Debra R. Bolter

Contributed equally to this work with: Debra R. Bolter, Marina C. Elliott, John Hawks, Lee R. Berger

Roles Conceptualization, Formal analysis, Investigation, Methodology, Writing – original draft, Writing – review & editing

bolterd@yosemite.edu

Affiliations Evolutionary Studies Institute and Centre for Excellence in PalaeoSciences, University of the Witwatersrand, Johannesburg, South Africa, Department of Anthropology, Modesto Junior College, Modesto, California, United States of America

Marina C. Elliott

Contributed equally to this work with: Debra R. Bolter, Marina C. Elliott, John Hawks, Lee R. Berger

Roles Formal analysis, Investigation, Methodology, Writing – original draft, Writing – review & editing

Affiliation Evolutionary Studies Institute and Centre for Excellence in PalaeoSciences, University of the Witwatersrand, Johannesburg, South Africa

John Hawks

Contributed equally to this work with: Debra R. Bolter, Marina C. Elliott, John Hawks, Lee R. Berger

Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Writing – review & editing

Affiliations Evolutionary Studies Institute and Centre for Excellence in PalaeoSciences, University of the Witwatersrand, Johannesburg, South Africa, Department of Anthropology, University of Wisconsin-Madison, Madison, Wisconsin, United States of America

Lee R. Berger

Contributed equally to this work with: Debra R. Bolter, Marina C. Elliott, John Hawks, Lee R. Berger

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Writing – review & editing

Affiliation Evolutionary Studies Institute and Centre for Excellence in PalaeoSciences, University of the Witwatersrand, Johannesburg, South Africa

Competing Interests

The authors have declared that no competing interests exist.