Hugh Everett (1930–1982) American physicist, author of the many-worlds interpretation of quantum mechanics
illustrating the branching of individuals in many worlds each time an observation is performed, in an early draft of his doctoral dissertation (1950s). Accessible at Read original documents http://www.pbs.org/wgbh/nova/manyworlds/original.html of Nova's Parallel worlds documentary of Hugh Everett's work.