The latest discovery marks the first-ever "compelling clue" that a black hole may be present in the enigmatic galaxy, ...

Researchers have spent the past few years watching a black hole re-awaken roughly 300 million light-years away from Earth.

ANAHEIM, Calif. — Long after the black hole in the center of a galaxy sputters out, you can still see its ghost lingering in surrounding gas clouds aglow with leftover radiation, like wisps of ...