Black holes

Roger Penrose, Reinhard Genzel and Andrea Ghez were awarded the Nobel Prize in Physics for their studies of black holes.

It was an old idea of Stephen Hawking’s: Unseen “primordial” black holes might be the hidden dark matter. A new series of studies has shown how the theory can work.

Claudia de Rham showed how theories of “massive gravity” could potentially get rid of the need for dark energy.

Can we test speculations about how quantum physics affects black holes and the Big Bang?

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.