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

This is the last of three blog posts associated with this week’s episode of Cosmos: A Spacetime Odyssey, which addresses life in the universe. Read the first and second here. Someday, in the not too ...

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

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

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

The video previously embedded in this article has been removed due to the inclusion of unverified information within a live ...

This new series highlights on-the-record conversations that didn’t make it into the published feature, with text directly ...

Keck II telescope observations of interstellar object 3I/ATLAS found "evidence for a puzzling anti-tail extension" pointing ...

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

The CIA has finally broken its silence on the mysterious Area 51 after 58 years - and now we have an idea of how aliens ...

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

Neil deGrasse Tyson explains why, despite believing life likely exists elsewhere, he's still waiting for real proof.