PEPPE, Daniel1, COTE, Susanne2, DEINO, Alan L.3, FOX, David L.4, KINGSTON, John D.5, KINYANJUI, Rahab N.6, LUKENS, William7, MACLATCHY, Laura M.8, NOVELLO, Alice9, STROMBERG, Caroline10, DRIESE, Steven11, GARRETT, Nicole12, HILLIS, Kayla R.13, JACOBS, Bonnie F.14, JENKINS, Kirsten E.15, KITYO, Robert16, LEHMANN, Thomas17, MANTHI, Fredrick K.6, MBUA, Emma N.6, MICHEL, Lauren13, MILLER, Ellen18, MUGUME, Amon19, NENGO, Isaiah20, OGINGA, Kennedy Ogonda21, PHELPS, Samuel R.22, ROSSIE, James B.23, STEVENS, Nacny J.24, UNO, Kevin25 and MCNULTY, Kieran P.26, (1)Department of Geosciences, Baylor University, One Bear Place #97354, Waco, TX 76798-7354, (2)Department of Anthropology and Archaeology, University of Calgary, Calgary, AB 2N 1N4, Canada, (3)Berkeley Geochronology Center, 2455 Ridge Road, Berkeley, CA 94709, (4)Department of Earth Sciences, University of Minnesota, Minneapolis, MN 55455, (5)Department of Anthropology, University of Michigan, 101 West Hall, 1085 S. University Ave, Ann Arbor, MI 48109-1107, (6)Earth Sciences, National Museums of Kenya, P.O Box 40658-00100, Nairobi, 254, Kenya, (7)Department of Geology and Environmental Science, James Madison University, Harrisonburg, VA 22807-1004, (8)Department of Anthropology, University of Michigan, Ann Arbor, MI 48109, (9)Aix-Marseille Université, Jardin du Pharo, 58 Boulevard Charles Livon, Marseille, 13007, France; Department of Biology, University of Washington, Life Sciences Building (LSB), Box 351800, Seattle, WA 98195-1800, (10)Department of Biology, Burke Museum of Natural History and Culture, University of Washington, Box 351800, Seattle, WA 98195, (11)Department of Geosciences, Baylor University, Waco, TX 76798, (12)National Marrow Donor Program, 500 North 5th St., Minneapolis, MN 55401; Department of Geology and Geophysics, University of Minnesota, 310 Pillsbury Drive SE, Minneapolis, MN 55455-0219, (13)Department of Earth Sciences, Tennessee Tech University, Box 5062, Cookeville, TN 38505, (14)Huffington Dept. Earth Sciences, Southern Methodist University, PO Box 750395, Dallas, TX 75275, (15)Department of Social Sciences, Tacoma Community College, 6501 S 19th Street, Tacoma, WA 98466, (16)Department of Biological Sciences, Makerere University, P.O Box 7062, Kampala, 8HP8+99, Uganda, (17)Messel Research and Mammalogy Department, Senckenberg Research Institute and Natural History Museum Frankfurt, Senckenberganlage 25, Frankfurt, 60325, Germany, (18)Department of Anthropology, Wake Forest University, Winston-Salem, NC 27106, (19)Department of Biological Sciences, Makerere University, P.O Box 7062, Kampala, 8HP8+99, Uganda; Department of Museums and Monuments, Uganda National Museum, Ministry of Tourism, Wildlife and Antiquities, Kira Rd, Kampala, 8HPJ+6W, Uganda, (20)Turkana Basin Institute, Stony Brook University, Stony Brook, NY 11794, (21)Terra Guidance, Englewood, CO 80110; Terrestrial Paleoclimatology Research Group, Department of Geosciences, Baylor University, One Bear Place, #97354, Waco, TX 76798, (22)Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138, (23)Department of Anthropology, Stony Brook University, Stony Brook, NY 11794, (24)Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, Athens, OH 45701, (25)Human Evolutionary Biology, Harvard University, 11 Divinity Ave, Cambridge, MA 02138, (26)Department of Anthropology, University of Minnesota, 395 Hubert H. Humphrey Center, 301 19th Avenue South, Minneapolis, MN 55455