Unveiling the high-energy Universe with IceCube

The IceCube Neutrino Observatory consists of a billion tons of ice at the geographic South Pole instrumented with photomultiplier tubes to detect high-energy neutrinos. IceCube has discovered that TeV–PeV neutrinos are abundant in the Universe. We have recently determined that about 10% of the neutrinos are from our own Galaxy, while about 90% are extragalactic. Identifying the origins of both the extragalactic and the Galactic neutrinos has just begun. About 1% of the neutrinos originate close to the black hole at the center of nearby active galaxy NGC 1068, and there is additional evidence for neutrino emission from other galaxies with active supermassive black holes. It is possible that the neutrino sky is as surprising, diverse, and dynamic as the photon sky. I will present recent highlights from IceCube's measurements of astrophysical neutrinos.