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Carl David Anderson (1905-1991), US physicist and Nobel laureate. Anderson was educated at Caltech, California, and spent his whole career there. Anderson shared the 1936 Nobel Prize for Physics with Victor Franz Hess. The share of the Nobel was awarded for Anderson's discovery in 1932 of the positron, the antiparticle of the electron. Its existence had been predicted by Dirac in 1928. Anderson found it in the impact products of cosmic rays, energetic particles that impact the Earth from space. He also discovered a short-lived heavy particle, the muon.
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