A slowly spinning universe could resolve a puzzle in physics known as the Hubble tension, a new model suggests.

General relativity is an astonishingly beautiful theory, and grappling with why it disagrees with quantum mechanics is a joy, ...

"The singularity is the most mysterious and problematic part of a black hole. It's where our concepts of space and time ...

A network of Earth's best clocks will be synchronised with the most accurate one ever sent into space. But the device has a ...

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

In the realm of general relativity, black holes are well-known for their ability to trap light and matter by bending ...

Supermazes” are theoretical structures that provide a fresh blueprint for understanding the microscopic complexity of black ...

During the latter part of the 20th century, string theory was put forward as a unifying theory of physics foundations. String ...

As with many myths, there’s some truth to it. “I learned general relativity three times,” says Spencer Weart, director of the Center for History of Physics at the American Institute of Physics.

Earlier studies provided a rough picture of black holes, like a low-resolution image with 1,000 pixels. In contrast, ...

In the vast universe, galaxies rotate in ways that don’t make sense if only visible matter is considered. For almost a ...

In the realm of general relativity, black holes are well-known for their ability to trap light and matter by bending ...