Ever wondered what gravity really is? Is it a force, or is there more to it than we know? In this video, we break down the theory of general relativity, revealing how mass and energy bend the fabric ...

General relativity and changes in Mercury's orbit The orbit of Mercury is shifting very gradually over time due to the curvature of space-time around the massive sun, according to NASA.

General relativity is distinguished from other metric theories of gravitation by its use of the Einstein field equations to relate spacetime content and spacetime curvature.

Albert Einstein's theory of general relativity has held up pretty well after a century out in the world.

In General Relativity, we treat space and time as continuous, but all forms of energy, including but not limited to mass, contribute to spacetime curvature.

Brief history of "dark energy" The idea of dark energy is as old as general relativity itself. Albert Einstein included it when he first applied relativity to cosmology exactly 100 years ago.

Albert Einstein's theory of general relativity—which explains gravity as the product of the distortion of space and time—may not be universally applicable. This is the conclusion of physicists ...

There are new hints that the fabric of space-time may be made of "memory cells" that record the whole history of the universe ...

General relativity tells us that gravity is not a force, but a curvature of spacetime. A century ago this year, a young Swiss physicist, who had already revolutionized physics with discoveries ...

Is it necessarily almost flat? While it might seem obvious that smaller mass would lead to smaller curvature, things are not so cut and dry when it comes to general relativity. According to the theory ...