1. Department of Environmental Studies; Knox College; Galesburg; Illinois
2. Department of Earth and Planetary Sciences; Washington University in St. Louis; St. Louis; Missouri
3. Department of Human Evolution; Max Planck Institute for Evolutionary Anthropology; Leipzig; Germany
4. Department of Anthropology; University of Pennsylvania; Philadelphia; Pennsylvania
5. Museum of Archaeology and Anthropology; University of Pennsylvania; Philadelphia; Pennsylvania
6. Muséum national d'Histoire naturelle; Les Eyzies-de-Tayac; France