New views of two colliding black holes confirm predictions made by Stephen Hawking using Albert Einstein’s theory.

"GW250114 is the loudest gravitational wave event we have detected to date; it was like a whisper becoming a shout." ...

As the universe expands, it feels like it must be spreading out from some initial point. But a physicist explains why that’s ...

Textbooks give strange, imprecise explanations of where things happen in quantum mechanics. Consistency with gravity needs a fresh approach.

Astronomers detected in unprecedented detail a collision between two black holes. Their observations confirm predictions made ...

The discovery in 1998 that the Universe is expanding faster over time shook the foundations of cosmology. This finding challenged deep-seated assumptions about how space behaves on the grandest scales ...

Many theories are rock-solid: Scientists have just as much confidence in the theories of relativity, quantum mechanics, ...

For over 100 years, two theories have shaped our understanding of the universe: quantum mechanics and Einstein’s general relativity. One explains the tiny world of particles; the other describes ...

Einstein’s theory of special relativity tells us that for a moving object, time passes more slowly than for a stationary ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: koto_feja via Getty Images Physicists have developed a novel approach to solving one of ...