Dr. Robert Sapolsky is John A. and Cynthia Fry Gunn Professor of Biological Sciences at Stanford University and Professor of Neurology and Neurosurgery in Stanford's School of Medicine. Professor Sapolsky earned his A.B. summa cum laude in Biological Anthropology from Harvard University and his Ph.D. in Neuroendocrinology from The Rockefeller University in New York. He is also a research associate at the Institute of Primate Research operated by the National Museums of Kenya in Nairobi. Dr. Sapolsky is a recipient of a MacArthur genius fellowship. His teaching awards include Stanford University's Bing Award for Teaching Excellence and an award for outstanding teaching from the Associated Students of Stanford University. Professor Sapolsky is the author of several books, including Stress, the Aging Brain and the Mechanisms of Neuron Death (MIT Press, 1992); The Trouble with Testosterone (Macmillan Library Reference, 1997); and Why Zebras Don't Get Ulcers: A Guide to Stress-Related Diseases and Coping (W.H. Freeman, 1995), which was a finalist for the Los Angeles Times Book Award. He also regularly contributes to magazines and journals such as Discover, Science, Scientific American, Harper's, and The New Yorker.