The authoritative guide to ensuring science and technology make life on Earth better, not worse.

Watch the 2025 Doomsday Clock announcement on January 28


Kenneth T. Bainbridge

Kenneth T. Bainbridge, the George Vasmer Leverett Professor of Physics at Harvard University, was in charge of the first test of a nuclear bomb in the desert at Alamogordo, N.M.,  on July 16, 1945. Bainbridge died in 1996.