For more than a century, gravity has been the immovable backdrop of modern physics, a force that can be described and ...

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

In 2014, no less an authority than NASA proclaimed in peer-reviewed papers that it was getting mysterious thrust from the EmDrive, a strange, brassy trumpet of a thing that its creators claimed could ...

Forbes contributors publish independent expert analyses and insights. The Universe is out there, waiting for you to discover it. Imagine a rocket that works without fuel. You pump energy into it and ...

IT should be impossible, but a prototype space engine appears to produce energy from nothing — and it just passed a big test. The reactionless thruster was met with a surge of excitement — and ...

A new theory of inertia could explain how NASA is generating thrust with a new drive design, and may even show them how to make it more powerful. Share on Facebook (opens in a new window) Share on X ...

In his 1962 essay Hazards of Prophecy, the late science fiction author Sir Arthur C. Clarke describes the failures of nerve and imagination that lead otherwise learned people to declare future ...