Now, two unrelated-but-similar experiments confirm that, in a double-slit experiment, detection of a photon’s path (its ...

Wormholes are often imagined as tunnels through space or time—shortcuts across the universe. But this image rests on a ...

The German theoretical physicist, author of the theory of relativity, left behind a legacy of powerful quotations that remain ...

The man was the smartest person on the planet. On his birthday, why not celebrate by quoting him and sounding brilliant?

The Princeton that Albert Einstein knew in 1933 was sharply divided by the color line; a long-established border—marked by ...

Physicists in China have brought one of Einstein’s thought experiments into reality—but not quite with the outcome he hoped for.

In July 1930, Rabindranath Tagore visited Albert Einstein in Caputh, near Berlin, at his summerhouse. The meeting of the two ...

Einstein’s claim that the speed of light is constant has survived more than a century of scrutiny—but scientists are still ...

The collection of items belonged to Albert Einstein's sister, Maja Einstein. Albert Einstein sits with page of equations in his home library. Alfred Eisenstaedt/Pix Inc./The LIFE Picture ...