A black hole infamous for strange features has once again baffled astronomers, this time with rapid X-ray flashes. What could they be?

Supermassive black holes are seen as sources of wanton cosmic destruction, but there may be more to their powerful influence ...

playing a game of peek-a-boo with an orbiting spacecraft through a strangely shaped hole in the clouds. Vesuvius is a 4,203-foot-tall (1,281 meters) stratovolcano located next to the city of ...