After more than a decade of searching, the IceCube neutrino detector in Antarctica has finally found high-energy particles from within the Milky Way. This discovery opens a window into how cosmic rays shape the universe. The disc of the Milky Way is incredibly bright in every wavelength of light – particularly in gamma rays, which tend to be accompanied by neutrinos. But any neutrinos from within our galaxy have historically been overwhelmed by stronger signals from other galaxies, so we haven't been able to observe them. "It took us 10 years to find the galactic plane in neutrinos," says IceCube head Francis Halzen at the University of Wisconsin-Madison.