Letters: Readers offer their explanations for the absence of hard evidence for extraterrestrial civilisations, in response to ...

An unusual long line of illuminous lights caught the attention of people across the UK ...

Altamira was advertised to settlers as a “Planet of Opportunity,” but a sudden war collapsed interstellar civilization and ...

A spectacular photograph of a saucer-shaped cloud over Canmore, Alberta, has sparked a wild online debate, with one researcher claiming it hides a cloaked UFO deployed to scan human thoughts.

A former US defence scientist claims to have seen evidence of alien bodies stored in military facilities, urging for ...

If humanity ever makes contact with an intelligent extraterrestrial civilization, we will have no shortage of questions.

Alien: King Killer #5 brings Idris' war against the Three Kings to a bloody close, as old enemies unite against a fresh ...

Interest in a mysterious 'lost continent' where believers claim an advanced civilization once existed has been rekindled ...

Treehouse of Horror episodes of The Simpsons have been parodying The Twilight Zone for years now. We've ranked the absolute best of the best.

AI doesn't need human motives to produce autonomous harm. If people use such breaches for personal gain, the motive is human, even if AI systems facilitate the action.

We break down the emotional conclusion of the sci-fi hit Project Hail Mary, exploring the fates of Ryland Grace and his alien ...