More than 300 guests gathered in Caspary Auditorium for a Fall Evening Program held at The Rockefeller University on Thursday, November 5, 2015. The event was presented jointly by the Rockefeller University Council, the Committee on Trust & Estate Gift Plans, the Women & Science initiative, and the Parents & Science initiative. The program, entitled, SLEEP: Why Our Brains and Our Bodies Need It, featured Rockefeller professor Michael Young, Ph.D., and guest speaker Ana Krieger, M.D., M.P.H., medical director of the Weill Cornell Center for Sleep Medicine. Dr. Young shared his discoveries about the genes and proteins that govern circadian rhythms and that play a role in setting our biological clocks. Dr. Krieger expounded on the importance of good sleep habits and the implications of good sleep for optimal health. After their presentations, Drs. Young and Krieger were joined by Rockefeller President Marc Tessier-Lavigne, Ph.D., who led an engaging discussion between the speakers and an animated question and answer session with the audience. A festive reception followed the program.