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Discusses observations made by two research teams from the University of California, Santa Barbara, California and Hitachi Laboratory in Cambridge, England on the spin Hall effect in semiconductors. Result of a transport phenomenon proposed by Mikhail Dyakonov and Vladimir Perel of the Ioffe Institute, Leningrad, Russia; Details of the experiment conducted by the Santa Barbara team using Kerr probes; Observations made on the coupling of spins to light using light-emitting diodes by the Hitachi team.