And its impact was felt at once. The Manhattan Project counted many science fiction fans among its workers, and word of the story rapidly spread, until employees were talking about it openly in the cafeteria of the atomic weapons lab in New Mexico. Cartmill’s device bore minimal resemblance to the designs under development, but it didn’t matter. Edward Teller, who would later be known as the father of the hydrogen bomb, recalled that the reaction at Los Alamos was “astonishment.”

