For instance, what if we really are being visited by aliens from other worlds and they turn out to be aggressive, violent, ...

Alan Turing, the father of theoretical computer science, made a proposal that has put AI development on a flawed path for ...

Hollywood makes initiating alien contact seem much easier than it has proven to be. In E.T. the Extraterrestrial, E.T. got ...

From Independence Day: Resurgence to After Earth, these sci-fi action flops wasted ideas, stars, and spectacle.

K2-18b is one of the most promising worlds for the search for extraterrestrial life, so astronomers conducted an unusually ...

Why do we tend to assume that UFOs are crafts carrying alien beings rather than alien beings themselves? How the UFO ...

Thousands of people have reported UFOs or alien encounters in Northern California. That number could soon go up.

Australia's space agency said there's a completely rational, albeit cosmic, explanation behind the mysterious orbs that ...

A NASA astronaut preparing for a grueling eight-month stint in orbit reveals a plan to test for extraterrestrial life.

Steven Spielberg and aliens go back a long time – they're the cinematic equivalent of peanut butter and jelly. And the history of that successful pairing has led to his new sci-fi thriller "Disclosure ...