Over the past forty years, Howard Markel, MD, PhD, has practiced pediatrics and taught medical history at Johns Hopkins and University of Michigan. He is an award-winning author or editor of many books including his most recent history of DNA, The Secret of Life. He is a member of the National Academy of Medicine and a Guggenheim fellow. His work has appeared in the New York Times and The New Yorker. He lives in Ann Arbor, Michigan.