We are delighted to announce the opening of registration for the Ninth Conference of the Calorie Restriction Society International! The Conference will be held May 18-21 at the Hilton Tucson East in Tucson, Arizona, close to the University of Arizona’s main campus. Come join your fellow CR Society members to learn the results of cutting-edge CR science. Interact directly with key researchers in the fields of CR, metabolism, and the retardation of aging. Learn more from scientists and fellow practitioners about how to optimize your CR practice. And enjoy the beautiful Tucson spring! Register now!