It stands among the most famous theories ever created, but the general theory of relativity did not spring into being with a single, astonishing paper like the special theory of relativity in 1905.

When an object moves extremely fast—close to the speed of light—certain basic assumptions that we take for granted no longer apply. This is the central consequence of Albert Einstein's special theory ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. At least 3,700 years ago, Babylonian mathematicians approximated the ratio of a circle's ...

110 years ago today, Albert Einstein published his General Theory of Relativity, which redefined the relationship between matter and gravity. Suddenly, our mysterious universe made a little more sense ...

While the equation E=mc 2 is famous throughout the world, it was just the first step in Albert Einstein’s discoveries. The formula, describing the relationship between energy and matter, laid the ...

Space–time collision Artist’s impression of a black-hole binary system generating gravitational waves. The black holes will eventually merge, and this latest research could improve our understanding ...

After Albert Einstein published his special theory of relativity in 1905, he spent the next decade trying to come up with a theory of gravity. But for years, he kept running up against a problem. He ...

Ever since Einstein: nothing is faster than light. In 2011, an experiment at CERN seemed to prove the opposite - until the ...

At least 3,700 years ago,Babylonian mathematicians approximated the ratio of a circle’s circumference to its diameter. They inscribed their answer, the first discovered value of pi, on a humble clay ...