Einstein’s general theory of relativity can be summed up in just 12 words: “Space-time tells matter how to move; matter tells space-time how to curve”. But this short description from the ...

This is the last part of a three-part series examining the history, science and implications of Einstein’s general theory of relativity. Part one was published December 7. Part two was published ...

Special relativity. Einstein's theory is divided into special and general relativity. Special relativity came first and is based on the speed of light being constant for everyone. That may seem ...

In 1907, Albert Einstein had his “happiest thought” — people in free fall do not feel their own weight. This simple idea laid the foundation for his general theory of relativity, which ...

A century ago Albert Einstein unveiled a theory that would change the world — general relativity. Here are five things that need general relativity to work, and may help you manipulate that mind ...

Learn the basics of Einstein's theory of relativity in our infographic here. (Image credit: By Karl Tate, Infographics Artist) General relativity adds gravity to the theory of special relativity ...

In 1918, W.W. Campbell of the Lick Observatory in California explained how an effort to photograph a solar eclipse would allow a test of Einstein’s newer theory of general relativity, which he ...

New Book Offers Simple Explanation. News. ... Einstein discovered special relativity first in 1905, but special relativity is just a special case of general relativity that doesn't involve gravity.

New Quantum Gravity Theory Offers Hope for Reconciling Quantum Mechanics and General Relativity. ... us more to collaborate and innovate towards a single explanation of all the basic forces.