The concept of anti-gravity has long fascinated scientists, engineers, and the public, straddling the line between science fiction and serious scientific exploration. At its essence, anti-gravity ...

Discovering a machine that could somehow produce thrust without releasing propellant would be a game-changer for human space travel. There’s just one problem—such a device would defy the laws of ...

For decades, scientists have dismissed the idea of reactionless propulsion—the concept of generating thrust without expelling propellant—as a fantasy that defies the laws of physics. But Charles ...