Dr. Thomas Sudhof, PHD, investigator at Stanford University, poses for a portrait in his lab on Wednesday, Nov. 21, 2012 in Palo Alto, Calif. (Tony Avelar/AP Images for HHMI)
Dr. Thomas Sudhof, PHD, investigator at Stanford University, poses for a portrait in his lab on Wednesday, Nov. 21, 2012 in Palo Alto, Calif. (Tony Avelar/AP Images for HHMI)