Dr. Robert A. Norman is a board-certified dermatologist and an award-winning faculty member at five different medical schools, and he has been a contributor to the "Vital Signs" section of Discover for the past twelve years. He has written over twenty books, including The Woman Who Lost Her Skin (and Other Dermatological Tales) and 100 Questions and Answers on Aging Skin. His popular weekly radio show "Doc Talk" has provided expert advice and compelling medical stories for more than two years. Dr. Norman lives in Hillsborough County, Florida.