The Pentagon has released hundreds of UFO-related files, including Apollo mission transcripts, military videos and eyewitness reports of unexplained aerial phenomena. While the disclosures have raised ...

Rather than life starting independently on Earth, a fraction of the scientific community has spent years arguing that cosmic dust, comets, and asteroids act as interstellar delivery vehicles, carrying ...

Don’t expect a straightforward timeline, because continuity is a mess with the Alien and Predator timelines (even if, as in this list, you choose to ignore tie-in comics, novels, and games). Predator: ...