One possible means for identifying such sources is to backtrack the paths that high-energy cosmic neutrinos traveled on their way to Earth, since they are created by cosmic rays colliding with matter or radiation, producing particles that then decay into neutrinos and gamma rays.Scientists with the IceCube neutrino observatory at the South Pole have now analyzed a decade's worth of such neutrino detections and discovered evidence that an active galaxy called Messier 77 (aka the Squid Galaxy) is a strong candidate for one such high-energy neutrino emitter, according to a new paper published in the journal Science."This observation marks the dawn of being able to really do neutrino astronomy," IceCube member Janet Conrad of MIT told APS Physics.John Updike's 1959 poem, "Cosmic Gall," pays tribute to the two most defining features of neutrinos: They have no charge and, for decades, physicists believed they had no mass (they actually have a teeny bit of mass).So IceCube is well-positioned to help scientists advance their knowledge of the origin of high-energy cosmic rays."