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 ...

As you're reading this, NASA's records read some 250 spacecraft sent into space, carrying with them either humans or our hopes for some revolutionary discovery. None of them have actually left our ...

The TR-3B Black Manta is linked to decades of black triangle sightings and claims of an advanced propulsion system using pressurized mercury, nuclear energy, and plasma to reduce mass and signature.

A bold new propulsion system, proposed by engineer Jim Woodward, suggests that it might be possible to escape Earth’s gravity without traditional rocket fuel. The idea challenges conventional physics ...