Observatories may identify the sources of our new discoveries. Over the last few years, we've witnessed the start of two radically new ways of doing astronomy. For all of human history, everything we've learned about the cosmos has come from observing photons, from high-energy gamma rays down to the cosmic microwave background. But since the opening of the IceCube observatory at the South Pole, we've been able to track ultra-high-energy cosmic neutrinos. And earlier this year

The breakthrough discovery, published in the journal Nature Physics and hailed as a discovery as significant as that of gravitational waves, will offer a unique view of the cosmos by allowing a new generation of telescopes to shed light on the dark matter believed to make up five-sixths of the universe's matter. "We believe we've identified the first neutrino from outside our home galaxy, the Milky Way," said CSIRO astrophysicist Dr Phil Edwards, who led the Australian part o