Albert Einstein's general theories of relativity have been used to create tiny microscopic robots that can essentially "swim" ...

A photon emitted from a star a billion light-years away arrives at a telescope having experienced no time whatsoever. Not ...

General relativity stands as one of the bedrock theories in modern physics. Its strange view of relative time and space has been confirmed by countless experimental and observational tests, from ...

What does it mean to be to space-time? The seemingly simple question gets to the essence of twentieth-century physics and has driven a hundred-year debate between philosophy and science. In Einstein’s ...

Researchers have developed a method for steering microscopic swimming robots using light patterns and the principles of Einstein's theory of relativity. The technology is a potential first step toward ...