"Eventually, our own Voyager spacecraft will be extraterrestrial artifacts in other stellar systems." ...

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

Scientists may have just taken one of the biggest steps yet in the search for life beyond Earth. Meet K2 18 b, a distant ...

Scientists have found a hidden biosphere stretching miles beneath Earth’s surface and as deep as 6 miles below the seafloor.

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 ...

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

In 1952, a series of unexplained sightings took place in the skies above Washington. These unidentified objects attracted ...

The short answer is that there’s nothing to disclose. But that doesn’t mean we won’t make contact with extraterrestrial life ...

Avi Loeb vows to brief public and create website to share findings of team tasked with investigating origins of mysterious ...

The “Wow!” signal is one of our best pieces of evidence for aliens, but researchers are building a compelling case for a more ...