Gravitational distortions produced by distant galaxies show a slight—but notable—disagreement with Einstein's predictions.

What does it mean to be to space-time? The seemingly simple question gets to the essence of twentieth-century physics and has driven a hundred-year debate between philosophy and science. In Einstein’s ...

The search for quantum gravity is the next big step in physics, as researchers seek to unify the physics of the very small ...

Spacetime isn’t something that exists; it’s a model for describing how events happen. Treating events as objects creates ...

Researchers are using black hole “shadow” images to test whether Einstein’s relativity remains unshakable. With next-generation telescopes, they hope to spot telltale signs of alternative physics ...

Whether space-time exists should neither be controversial nor even conceptually challenging, given the definitions of “space-time,” “events” and “instants.” The idea that space-time exists is no more ...

Two blind spots torture physicists: the birth of the universe and the center of a black hole. The former may feel like a moment in time and the latter a point in space, but in both cases the normally ...

A fringe new theory suggests that time is the fundamental structure of the physical universe, and space is merely a byproduct. According to Gunther Kletetschka, a geologist — not a physicist, you’ll ...

Black holes are considered cosmic gluttons, from which not even light can escape. That is also why the images of black holes ...