A pair of neutrinos detected in Antarctica may be the first of these ghostly particles seen coming from outside the solar system since 1987. If the finding is confirmed, it could lead to a new way of looking at the universe that may solve a number of cosmic puzzles. Neutrinos have no charge and negligible mass, which means they can travel through space largely unimpeded by matter and electromagnetic fields. Detecting astrophysical neutrinos would offer an unprecedented way of studying cosmic objects across vast distances, similar to the way infrared light allows us to peer into opaque cosmic dust clouds to see stars forming.
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