Dr. H. Craig Heller is the Lorry I. Lokey/Business Wire Professor of Biological Sciences and Human Biology at Stanford University. He earned his Ph.D. in Biology from Yale University. Over the past three to four decades, virtually all biology undergraduates at Stanford have learned physiology from Professor Heller. In recognition of his outstanding performance, he received the Walter J. Gores Award for excellence in teaching and the Kenneth M. Cuthbertson Award for exceptional contributions to Stanford University. The coauthor of more than 200 peer-reviewed research papers, Professor Heller incorporates a wide range of topics into his research, including thermoregulation, hibernation, circadian rhythms, sleep, learning and memory, and human physical performance. His current focus is on the role of sleep and circadian rhythms in learning and memory as applied to the development of therapies for the learning disabilities associated with Down syndrome and Alzheimer's disease. Dr. Heller's laboratory is also dedicated to developing technologies for the efficient regulation of heat into and out of the body. Professor Heller is a coauthor of a leading college textbook, Life: The Science of Biology, now in its 10th edition, and the new biology textbook, Principles of Life.