On 25 November 1915, Albert Einstein presented his general theory of relativity at the Prussian Academy of Sciences. This theory is still considered to be the most important idea in modern physics.

Quantum theory and general relativity in fact don’t get along at all. The two theories generally work at very different scales, so that’s not a huge problem. But it prevents us from ...

A new physics paper takes a step toward creating a long-sought "theory of everything" by uniting gravity with the quantum ...

A Growing Mystery The discovery of the Universe’s accelerating expansion in 1998 left scientists scratching their heads, ...

For gravity, Einstein expanded on this work a decade later with his 1915 theory of general relativity. As objects approach the speed of light (approximately 186,282 miles per second or 300,000 km ...

Albert Einstein's general theory of relativity is one of the towering achievements of 20th-century physics. In our introduction to general relativity, we explain how this theory developed ...

Ever since general relativity pointed to the existence of black holes, the scientific community has been wary of one peculiar ...

Ever since general relativity pointed to the existence of black holes, the scientific community has been wary of one peculiar ...

For the first time, a mathematical framework proves that Einstein’s theory of general relativity, which explains the ...

Gravity is everywhere: pulling at your feet, holding satellites in orbit, and making the Earth spin around the sun. Yet, for ...

That wasn't just wifely pride. Years before Hubble detected cosmic expansion, Einstein had fashioned a theory, general relativity, that could explain it. In studies of the cosmos, it all goes back ...

Borrowing from industry, the team has created its vertexing detector using an array of modified mobile-phone camera sensors ...