A mysterious metal shard, once thought to be a piece of a UFO that crashed in 1947, has sparked years of wild speculation.

When a recent post on X posted images that showed that 3I/ATLAS might be more than a comet, claiming it glows in X-rays 'the same way a spaceship engine does,' the internet lit up with theories ...

From mudstones on Mars to strange gases in exoplanet atmospheres, tentative evidence for extraterrestrial life is starting to ...