The idea of black holes was first proposed in 1916, but at the time, physicists didn't think they actually existed. Today, we ...

In this video, we explore the fascinating world of black holes, starting with Karl Schwarzschild's groundbreaking ...

In a recent piece for my column The Universe, I wrote about the biggest black holes in the cosmos. These can tip the scales at many billions of times the sun’s mass, outweighing even entire galaxies.

As black holes feed, they pull material into a disk around them. The material orbiting in this disk gets heated to extreme temperatures, and so it becomes a plasma — a state of matter in which some of ...