Hugh Everett
US physicist and discoverer of the relative-state interpretation of quantum mechanics
Dr. Hugh Everett was an American physicist who got his Phd in 1957 when he came up with the Many-worlds interpretation of Quantum mechanics. This says that The Universe is not the only world that there is but that there are other Universes. It says that when more than one possible thing can happen, every one of those things happens at the same time and gets its own Universe.