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SNO Closes In on Solar Neutrino Riddle

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Science  18 Jun 1999:
Vol. 284, Issue 5422, pp. 1910
DOI: 10.1126/science.284.5422.1910

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The first neutrinos have been spotted colliding with heavy water molecules in a giant tank at the bottom of an Ontario nickel mine. Announced last week, the events mark the inauguration of the Sudbury Neutrino Observatory, a new facility that physicists hope will finally solve the solar neutrino problem, which has been haunting the field for decades.