Turyshev is a theoretical physicist at NASA’s Jet Propulsion Laboratory, in Pasadena, Calif. They each devoted years to solving the mystery of the Pioneer anomaly. Turyshev recalls many late nights spent reading navigational data from more than 400 magnetic tapes he’d found in moldy cardboard boxes beneath a staircase at JPL. “It took about as much time to clean the tape reader as it did to actually use it,” he says. Learn More