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

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

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

Whether a galactic environment has the right conditions for habitable planets to form could depend on how the black hole in ...