Institution: | 1. Center for the Advanced Study of Hominid Paleobiology, The George Washington University, Washington, D.C., U.S.A.;2. Department of Conservation and Science, Lincoln Park Zoo, Chicago, IL, U.S.A.;3. Committee on Evolutionary Biology, University of Chicago, Chicago, IL, U.S.A.;4. Department of Psychology, Franklin and Marshall College, Lancaster, PA, U.S.A.;5. Gombe Stream Research Centre, Gombe, Tanzania |