A siphonophore—a colonial marine invertebrate related to the venomous stinging Portuguese Man-o-war—is scanned using Deep ...

Scientists suggest that advanced aliens might not have physical bodies, challenging traditional views of extraterrestrial ...

A look at the idea of searching for signs of pollution beyond Earth.

A polarizing Harvard astronomer known for splashy theories about alien visits has been tapped by the Trump administration to lead a team of outside scientists to study the national security risks ...

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

A rare visitor from another star system prompted SETI to hunt for alien technology, but the mysterious object appears to be a ...

Extraterrestrial visitors are not only already here – they are landing in a top secret “alien airport” hidden away in the ...

Steven Spielberg knows there’s a faction of netizens that think Disclosure Day, his new aliens-are-among-us-thriller, was ...

New research suggests that alien radio signals may be transformed by plasma from their home stars — and scientists on Earth ...

SETI scientists searched the interstellar object 3I/ATLAS for radio signals that could indicate extraterrestrial technology ...

Once small enough, these technograins might gain a trip out of its host solar system by a solar wind that overcomes the star's gravity holding it back. These motes of dust are then free to roam the ...

The best way to find alien technosignatures is to look for ones that have long survived their creators, according to a new paper.