About the Authors

Richard A. Blythe

Contributed equally to this work with: Richard A. Blythe, Thomas C. Scott-Phillips

Affiliation School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom

Thomas C. Scott-Phillips

Contributed equally to this work with: Richard A. Blythe, Thomas C. Scott-Phillips

t.c.scott-phillips@durham.ac.uk

Affiliation Department of Anthropology, Durham University, Durham, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: RB TSP. Performed the experiments: RB. Analyzed the data: RB. Wrote the paper: RB TSP.