A new recipe for gravity could help solve some of the universe's greatest mysteries. It suggests that the concept of "quantum gravity" could arise from entropy, possibly solving puzzles put forth ...

At long last, a unified theory combining gravity with the other fundamental forces—electromagnetism and the strong and weak ...

Let's turn the sun into a telescope. In fact, we don't have to do any work—we just have to be in the right spot.

The European Space Agency has launched two atomic clocks on a SpaceX rocket to the ISS to test Einstein's theory of ...

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

“The chief attraction of the theory lies in its logical completeness,” wrote Albert Einstein after publishing his general theory of relativity in 1915. “If a single one of the conclusions ...

And there we have it: another principle of relativity, called general relativity. “Einstein always took what everyone else thought to be two completely different scenarios of nature and saw them ...

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It is called a black hole, because it acts like an ideal black body, as it reflects no light. According to the theory of ...