New Addition

Leonard Susskind has joined the faculty of Canada's Perimeter Institute for Theoretical Physics as an associate member. Susskind is a founder of "string theory," which holds that the universe is composed of tiny, vibrating strings. It also proposes that there are a number of extra, hidden spacetime dimensions, which means there may be multiple alternate universes. Susskind, a professor of theoretical physics at Stanford University, will conduct research at the institute. —Sara Kern