Astronomers trace the source of a high-energy particle that slammed into Earth

Astronomers may have discovered the deep-space origin of a mysterious high-energy particle that plunged straight through Earth last year. The tiny particle, known as a neutrino, seems to have come from a hyperactive black hole located 4 billion light-years away. It’s the first time researchers have pinpointed the possible origin for one of these high-energy neutrinos, bringing scientists closer to figuring out the objects that produce these strange lightweight particles that fill the Univ