black holes

We asked four physicists why gravity stands out among the forces of nature. We got four different answers.

By chewing on the problems posed by “extremal” black holes, physicists have exposed a surprising and universal connection between energy and entropy.

Einstein’s equations describe three canonical configurations of space-time. Now one of these three — important in the study of quantum gravity — has been shown to be inherently unstable.

And why is the black hole at the center of our own galaxy so dim?

A proposal for building wormhole-connected black holes offers a way to probe the paradoxes of quantum information.

After a space telescope disintegrated, astrophysicists had little hope of understanding how supermassive black holes agitate giant galaxies. Then they invented a hack.

For the first time, physicists have calculated exactly what kind of singularity lies at the center of a realistic black hole.

Calculations involving a higher dimension are guiding physicists toward a misstep in Stephen Hawking’s legendary black hole analysis.

Since the 1970s, physicists have described black holes using borrowed versions of the laws of thermodynamics. But are black holes really thermodynamic systems? Craig Callender worries that the analogy has been stretched too far.