Mathematicians are challenging the idea that dark energy is responsible for the accelerating expansion of the universe. In a ...

A fifth dimension could fit into general relativity after all—by using this one weird trick.

Cosmological dynamics under the framework of general relativity seeks to describe the evolution of the Universe by coupling Einstein’s field equations to the matter and energy content of spacetime.

The gauge bosons of the standard model of particle physics are responsible for three of the four known forces in the universe ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Albert Einstein's theory of general relativity—which explains gravity ...

Einstein's theory of gravity — general relativity — has been very successful for more than a century. However, it has theoretical shortcomings. When you purchase through links on our site, we may earn ...

Albert Einstein’s mind reinvented space and time, foretelling a universe so bizarre and grand that it has challenged the limits of human imagination. An idea born in a Swiss patent office that evolved ...

General relativity describes gravitation as the curvature of spacetime sourced by energy and momentum. In many astrophysical and cosmological contexts, matter is idealised as a perfect fluid, whose ...

The speed of light remains one of physics’ firmest assumptions, but scientists still test whether it ever shifts under ...

Physicists have measured Albert Einstein's theory of general relativity, or more specifically, the effect called time dilation, at the smallest scale ever, showing that two tiny atomic clocks, ...