In the depths of a South African gold mine, scientists have snared some strange cosmic ghosts that could be the basic stuff of the universe. They are the first natural neutrinos ever detected.
A neutrino is the most elusive and mysterious of the some 30 known particles of energy scattered by the splitting of the atom. For more than two decades the neutrino was known only in theory. It has no electric charge or mass of its own. It travels at the speed of light, can penetrate matter equal to 100 million miles of lead without being stopped. Billions of neutrinos...
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