Laura K. Barger, Ph.D. is an Instructor in Medicine in the Division of Sleep Medicine, Harvard Medical School and an Associate Physiologist in the Division of Sleep and Circadian Disorders at Brigham and Women’s Hospital. She is a founding member of the Harvard Work Hours, Health and Safety Group. Her research has focused on the health and safety risks associated with the work hours of various occupational groups, including medical residents, police officers, firefighters. flight controllers and federal air marshals.. She has directed a NASA-sponsored research projects examining the sleep of astronauts on Space Shuttle and International Space Station missions as well as the sleep of scientists and engineers living on the Mars sol (24.6 hr days) in support of the Mars Phoenix Lander. Dr. Barger’s research in this area has been published in high impact journals such the Journal of the American Medical Association (JAMA) and the New England Journal of Medicine.