IceCube sees highest-energy neutrino ever found

Observations of this kind could lead scientists to the source of ultra-high-energy cosmic rays. In 2013, the IceCube neutrino experiment at the South Pole reported the observation of two ultra-high-energy neutrino events, which they named after Sesame Street characters Bert and Ernie. Later, they found one more. It seems a fourth character has moved into the neighborhood. Today IceCube scientists reported the observation of an even higher-energy neutrino event, one that offers scientists the bes...