A UFO whistleblower claims a missing Air Force general was refusing to reveal secrets to Congress before his disappearance ...

A mysterious comet from beyond our solar system is giving astronomers a rare glimpse into alien worlds — and it may have formed in a place far colder and stranger than anything around our Sun. The ...

Star Trek's vast setting and complex worldbuilding create opportunities for several crossovers with classic sci-fi characters ...

James Cameron has officially teased his return to the Alien franchise 40 years after his Aliens sequel hit theaters.