Chinese scientist ignites global UFO debate with paper hinting at antigravity propulsion and inertial mass cancellation.

Scientists have found new evidence suggesting that interstellar 3I/ATLAS is not an alien spaceship, as one conspiracy theory claims, but a comet.

Bob Lazar claims he worked on alien spacecraft at Area 51, but his story remains one of the most divisive in UFO history.

Space exploration has always relied on the continuous improvement of spacecraft propulsion systems. As humanity dreams of reaching new frontiers, like Mars and beyond, one area of focus has been ...