1. Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), Sierra de Atapuerca 3, 09002 Burgos, Spain.
2. Stone Age Institute and CRAFT Research Center, 1392 W. Dittemore Rd., Gosport, IN 47408, USA.
3. Department of Anthropology, Southern Connecticut State University, 501 Crescent Street, New Haven, CT 06515, USA.
4. Department of Anatomy, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA.
5. Laboratory of Physical Anthropology, Cleveland Museum of Natural History, Cleveland, OH 44106, USA.
6. Department of Earth and Environmental Sciences, University of Michigan, 1100 North University Avenue, Ann Arbor, MI 48109, USA.
7. Department of Geosciences/Desert Laboratory, University of Arizona, Tucson, AZ 85721, USA.
8. New Mexico Bureau of Geology and Mineral Resources, Earth and Environmental Science Department, New Mexico Tech, 801 Leroy Place, Socorro, NM 87801-4796, USA.
9. Universitat Rovira i Virgili (URV), Avinguda de Catalunya 35, 43002 Tarragona, Spain.
10. IPHES, Institut Català de Paleoecologia Humana i Evolució Social, Zona Educacional 4–Campus Sescelades URV (Edifici W3), 43007 Tarragona, Spain.
11. Watershed Studies Institute and Department of Earth and Environmental Sciences, Murray State University, Murray, KY 42071, USA.
12. Department of Anthropology, Columbia University, 1200 Amsterdam Ave., New York, NY 10027, USA.
13. The University of Utah, 201 South Presidents Circle Room 201, Salt Lake City, UT 84112, USA.
14. Department of Physics, University of Portland, Portland, OR 97203, USA.
15. Department of Anthropology, Emory University, 1557 Dickey Drive, Atlanta, GA 30322, USA.
16. Chevron Energy Technology Company, 1500 Louisiana St., Houston, TX 77002, USA.