Planet Earth could be giving out its own signals, which could in turn be detected by distant astronomers on an alien planet ...

The Great Filter theory suggests advanced civilisations may self-destruct before contacting others, explaining the universe's ...

Somewhere in the Mojave Desert, a gleaming white dome sits in the middle of nowhere, and the story behind it is stranger than ...

"It's a lot of fun, as long as you don't pay too much attention to the critics," says Loeb ...

Why are we allowing unidentified objects to operate with impunity in our skies?” one expert testified Tuesday.

Space exploration was a major theme of a state House hearing on Tuesday, even as the budget deadline looms over lawmakers.

A polarizing Harvard astronomer has been appointed to lead a White House panel studying UFOs. Avi Loeb is leading a new ...

The Harvard astrophysicist has devoted years—and thousands of interviews—to the idea that mysterious objects streaking ...

Astronomers have recently started looking for black holes bigger than galaxies. Brian Lacki explains how these “stupendously ...

The pilots dubbed the fireballs “foo fighters” but had no idea what they were. Plasma? Enemy tech? Aliens? We still haven’t ...

Somewhere out there, a planet roughly the size of Earth may be orbiting a distant star in conditions that could support life.

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