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DIED. OWEN CHAMBERLAIN, 85, Nobel-prizewinning physicist at the University of California, Berkeley; in Berkeley, Calif. Chamberlain worked on the Manhattan Project and later apologized to the Japanese for the Hiroshima and Nagasaki bombings. In 1955, he and fellow Manhattan Project alum Emilio Segre identified the antiproton, the negatively charged mirror of the subatomic particle, a discovery that sparked still unresolved debates about the composition of the universe.