This new propulsion system could rewrite the rules of spaceflight—not to mention completely defy conventional physics.

Big G, gravity, is the oldest fundamental constant in physics and the least clearly defined. One scientist has spent a decade ...

A rewrite of quantum mechanics that includes the force of gravity could finally achieve one of physicists’ biggest goals and ...

For more than 200 years, scientists have struggled to pin down the exact strength of gravity — and one physicist spent a decade chasing the answer while keeping his own results hidden from himself.

We have long taken it for granted that gravity is one of the basic forces of nature—one of the invisible threads that keeps the universe stitched together. But suppose that this is not true. Suppose ...

Light from a distant galaxy becomes warped as it travels through space-time gravitationally curving around a foreground cluster. (Saurabh Jha/Rutgers, The State University of New Jersey) The motion of ...