About the Authors
Department of Biodiversity and Evolutionary Biology, National Museum of Natural Sciences, Consejo Superior de Investigaciones Científicas, Madrid, Spain
National Research Center on Human Evolution, Centro Nacional De Investigación Sobre La Evolución Humana, Burgos, Spain
Natural Environment Research Council Centre for Population Biology, Imperial College London, Ascot, Berkshire, United Kingdom
Department of Earth and Environment, Mount Holyoke College, South Hadley, Massachusetts, United States of America
The authors have declared that no competing interests exist.
DNB conceived the manuscript. DNB and JR designed the experiments and analyzed the data. PB worked on the paleoclimatic data. All authors discussed the methods, results, and commented on the manuscript. DNB wrote the final version of the manuscript.