New research suggests that alien radio signals may be transformed by plasma from their home stars — and scientists on Earth could thus be overlooking prime evidence of alien intelligence.

Attention human. You are receiving an interstellar radio transmission. And it could be coming from one of the nearest exoplanets, Proxima Centauri b. What conditions make this planet a candidate for ...

This video explores a hypothetical scenario regarding a global extraterrestrial invasion starting from a security breach at a ...

As evidence, he cited "the circumstantial evidence that I've gathered throughout my whole life, everybody I've listened to ...

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

Get the latest federal technology news delivered to your inbox. You might think this column is about UFOs and the Pentagon's ...

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 ...

Star Trek's Prime Directive revolutionized the science fiction genre by promoting cooperation and non-interference with alien ...

Disclosure Day treats extraterrestrial life as a challenge to faith. It’s not.

Add Yahoo as a preferred source to see more of our stories on Google. The night sky looks crowded, but physics may keep distant civilizations from ever meeting or even noticing one another. (CREDIT: ...

Project Hail Mary, Solaris, and The Hitchhiker's Guide to the Galaxy are all among the very best sci-fi books set in space.