About the Authors

Carl P. Lipo

Contributed equally to this work with: Carl P. Lipo, Mark E. Madsen

clipo@csulb.edu

Affiliation Department of Anthropology and IIRMES, California State University Long Beach, 1250 Bellflower Blvd., Long Beach, CA 90840, USA

Mark E. Madsen

Contributed equally to this work with: Carl P. Lipo, Mark E. Madsen

Affiliation Department of Anthropology, Box 353100, University of Washington, Seattle, WA 98195-3100, USA

Robert C. Dunnell

† Deceased.

Affiliation Department of Anthropology and Middle Eastern Cultures, P.O. Box AR, Mississippi State University, MS 39762, USA

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CPL MEM RCD. Performed the experiments: CPL. Analyzed the data: CPL. Wrote the paper: CPL MEM RCD.