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

Most people know that black holes are kind of scary. Admittedly, that's true, but black holes are so much more than that.

Extreme cosmic events such as colliding black holes or the explosions of stars can cause ripples in spacetime, so-called ...

When the gravitational wave rolled by, it tickled the detectors, providing the unmistakable signature of colliding black holes on the other side of the universe and marking the beginning of a new ...

Extreme cosmic events such as colliding black holes or the explosions of stars can cause ripples in spacetime, so-called gravitational waves. Their discovery opened a new window into the universe.

Buonanno's division on the prediction of the gravitational waves that are generated when black holes collide. Albert Einstein predicted the existence of gravitational waves 100 years ago. These tiny ...

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

Primordial black holes are the earliest black holes thought to exist, and they vanished almost as fast as they came into ...

When two enormous black holes collide in deep space, they send shockwaves rippling across the universe. These shockwaves, called gravitational waves, bend and stretch the fabric of space itself.

WATCH: Here’s the first image of the black hole at the center of our galaxy The world got a look Thursday at the first wild but fuzzy image of the supermassive black hole at the center of our ...