Einstein believed that black holes didn't really exist. But they do: that much we know. We don't know much else about them.

A mysterious black hole in a distant galaxy just woke up after decades of silence—and it’s putting on a cosmic light show!

A massive black hole at the heart of a galaxy in the Virgo constellation is waking up, shooting out intense X-ray flares at ...

Ansky, a once-dormant black hole, is now emitting powerful X-ray bursts, giving scientists a rare chance to study its ...

In 2022, experts from the University of Amsterdam simulated a black hole event horizon to test Stephen Hawking's 1974 radiation theory.

Scientists have uncovered the strongest evidence yet for the existence of elusive intermediate-mass black holes (IMBHs), long ...

Astronomers are investigating the longest and most energetic bursts of X-rays seen from a newly awakened black hole. Watching this strange behavior unfold in real time offers a unique opportunity to ...

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

"What happens if you fall into a black hole? How to Survive is a Webby Award-winning series offering expert tips for ...

We all know that black holes can devour stars, rip them apart and consume their remnants. But that only happens if a star ...