About the Authors
- Karel Kleisner, Lenka Priplatova, Jaroslav Flegr
- Department of Philosophy and History of Science, Charles University in Prague, Prague, Czech Republic
- Peter Frost
- Department of Anthropology, Université Laval, Quebec City, Canada
The authors have declared that no competing interests exist.
Conceived and designed the experiments: KK JF. Performed the experiments: KK LP. Analyzed the data: KK. Wrote the paper: KK PF JF.