Baby black holes chirp as they’re born, just as Einstein predicted

Scientists have heard a “baby” black hole for the very first time, and it sounds like “chirp.” Einstein predicted that the creation of a black hole would sound like ringing and that the pitch could signal its mass and spin, and his theory has been prov…

The black hole at the center of our galaxy is flaring and no one knows why

At the heart of our galaxy lies a supermassive black hole, Sagittarius A*. Normally this giant monster is relatively docile, but recently it’s been a hotbed of unexpected activity, rapidly glowing 75 times brighter than normal.