1. Center for the Advanced Study of Human Paleobiology, Department of Anthropology, George Washington University, Washington, DC 20052, USA.
2. Human Origins Program, National Museum of Natural History, Smithsonian Institution, Washington, DC 20013-7012, USA.
3. Archaeology Program, National Science Foundation, Alexandria, VA 22314, USA.
4. Department of Earth Sciences, National Museums of Kenya, Post Office Box 40658-00100, Nairobi, Kenya.
5. Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, DC 20013-7012, USA.
6. Berkeley Geochronology Center, Ridge Road, Berkeley, CA 94709, USA.
7. Department of Anthropology, University of Connecticut, Storrs, CT 06269, USA.
8. Department of Anthropology, University of Illinois at Urbana–Champaign, Urbana, IL 61801, USA.
9. University of Missouri Research Reactor Center, Columbia, MO 65211, USA.
10. Centre National de la Recherche Scientifique, UMR 5199–De la Préhistoire à l’Actuel: Culture, Environnement et Anthropologie (PACEA), Université de Bordeaux, 33615 Pessac, France.
11. Senter for Fremragende Forskning (SFF) Centre for Early Sapiens Behaviour (SapienCE), University of Bergen, Postboks 7805, 5020 Bergen, Norway.
12. Laboratory of Analytical Biology, National Museum of Natural History, Smithsonian Institution, Washington, DC 20013-7012, USA.
13. Department of Mineral Sciences, National Museum of Natural History, Smithsonian Institution, Washington, DC 20013-7012, USA.
14. Department of Anthropology, Emory University, Atlanta, GA 30322, USA.