Earth is dotted with humongous, human-made structures that, to an alien eye, may be tell-tale signs of intelligent goings-on.

Scientists have discovered unexpected water-ice clouds on a distant, Jupiter-like exoplanet, challenging current atmospheric ...

Data from the James Webb Space Telescope on exoplanet K2-18b has revealed the "strongest hints yet of biological activity ...

"It's a profound idea that we are looking at a map of material that could rain on nascent planets and potentially support ...

NASA has uncovered major new clues on Mars that could point to alien life. The space agency’s rover has found chemicals on ...

Aristotle's views on the nature of the cosmos dominated the Ancient Greek world. He argued that there's only one world, at ...

As excitement builds for 'From' Season 4, fans are diving into a whirlpool of theories. Will Randall or Boyd step into the ...

A new study proposes detecting life in space by spotting patterns across many planets instead of focusing on one at a time.

A former Air Force officer claimed he was forced to sign a gag order silencing him about a chilling UFO encounter that ...

Behind the acid blood and jump scares of the Alien franchise is an even more insidious horror: a single employer with ...

The subject of UFOs and aliens is vast and complex, making it impossible to summarize in one article. Flying saucers/UFOs made headline news throughout the world in 1947, sparked by two major, highly ...

Trump has ordered a UFO data release. But if aliens exist, what would they think of us? - For generations, human beings have wondered: What would alien life from another planet be like ...