Harold L. Dibble is a Paleolithic archaeologist specializing in Neanderthal behavior. He has directed excavations at a number of sites in France, Egypt, and Morocco, and he is director of the Laboratory for the Study of Ancient Technology, which focuses on experiments in stone tool production. He is currently professor of anthropology at the University of Pennsylvania and curator-in-charge of the European Archaeology Section at the Penn Museum.

The authors would like to acknowledge the other members of their research team: a third Paleolithic archaeologist, Shannon McPherron (at Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany) and two geoarchaeologists: Paul Goldberg (a professor emeritus at Boston University) and Vera Aldeias (a researcher at Max Planck Institute).