In it, he suggested that gravity is not a force, as Newton had believed, but the result of a curvature of the space-time continuum -- the four dimensional world in which we live. He used a thought ...

Could a reactionless, gravity-defying propulsion system actually work? A former NASA engineer says yes, but scientists are ...

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

The force of gravity is transmitted through spacetime ... Newton used a mathematical approach to gravity not unlike Coulomb ...

“Space historically has not been populated by people who want ... Gravity—or, more precisely, resistance to gravity—is the force that gives our muscles their power, and gives our bones ...

it is not easy to measure unless one of the objects is really, really big. The Earth, for example, is massive enough for the force due to gravity to be noticed. Some objects fall differently ...

and a force that repels gravity known as dark energy (70 percent). Scientists have not yet observed dark matter directly. It doesn't interact with baryonic matter and it's completely invisible to ...