SAVANNAH, Ga.?A belowground experiment at the South Pole has now discovered three of the highest-energy neutrinos ever found, particles that may be created in the most violent explosions of the universe. These neutrinos all have energies at the absurdly high scale of peta?electron volts?roughly the energy equivalent of one million times a proton?s mass. (As Albert Einstein showed in his famous E = mc2 equation, energy and mass are equivalent, and such a large amount of mass converts to an extreme level of energy.) The experiment, called IceCube, reported the discovery of the first two?nicknamed Ernie and Bert?last year, and announced the third Monday here at the American Physical Society meeting. ?Internally, it?s known as Big Bird,? said IceCube physicist Chris Weaver of the University of Wisconsin?Madison.
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