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 ...

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

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

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

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

Most scientists search for aliens by waiting for signals that may never come. Avi Loeb argues that real evidence requires ...

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

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

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 ...

Tennessee Rep. Tim Burchett, who did not elaborate on the alleged briefings he received, has pushed for the government to share what it knows about UFOs during his time in Congress ...