Earth" less than 20 light-years from our own planet is offering scientists new hope in the hunt for other worlds that could ...

Is anybody out there? Probably. Most stars have planets; we've discovered more than 6,000 exoplanets thus far, and the most ...

Panic and speculation rise as reports of 'two moons', UFO sightings, and the interstellar object 3I/ATLAS spark wild theories ...

The discovery of interstellar object 3I/ATLAS coincides with SETI's proposed new post-detection rules—raising public fears of ...

NASA’s discovery of potential evidence of ancient life on Mars means “our galaxy could be teeming with life,” says a ...

Scientists found new evidence to strengthen the case that Enceladus, small moon of Saturn about 310 miles wide, may have ...

Enceladus has long been considered a prime candidate in the search for life beyond Earth because of its hidden ocean and ...

The Milky Way contains a modest amount of alien civilizations, a new paper proposes — and there's a reason we aren't seeing ...

Scientists may have just found alien life—on a distant ocean world 124 light-years away. Dimethyl sulfide, a known ...

The comet 3I/ATLAS, which many still believe to be a form of alien spacecraft, may reveal its origin as it passes behind the ...

A new study used mathematical formulas and demonstrated that it’s highly unlikely life began on Earth. Instead, the ...

For decades, astronomers have searched the skies for proof that we’re not alone. Every new telescope, signal, and sample ...