Claims that aliens are already here are everywhere, but proving them is another matter. The strongest cases become more ...

Pulverised technology from collapsed alien civilisations may lie scattered across the solar system, including on the Moon, a new study suggests. The likelihood of advanced aliens living at the same ...

A strange interstellar comet discovered last year and speculated by a prominent astronomer to be an alien spacecraft could be older than our Solar System, according to a new study. The comet, first ...

The next major search for extraterrestrial intelligence might involve putting Moon dust under a microscope rather than pointing a radio telescope toward the stars. A new study led by SETI Institute ...

A new study proposes searching the moon for remnants of ancient extraterrestrial technology. Researchers suggest the moon's surface could preserve microscopic "technosignatures" left by alien ...