Could ancient humans really have built the pyramids without extraterrestrial help? Or do such questions reveal more about modern anxieties than the past itself?

Debunking alien claims matters, but so does telling richer, more compelling stories about how humans shaped their own past.

Astronomers have spotted a planet orbiting a star in our neighborhood of the Milky Way galaxy that presents a unique ...

An alien-themed "micro resort" just minutes from Utah's Zion National Park has landed back on the market with a $1.49 million ...

This scene imagines the mysterious beauty of alien worlds beyond our solar system. The landscape features unusual plant life, ...

What: SETI Institute Artists-in-Residence present Exoplanetary Poetry, an art-science collaboration that trains artificial intelligence on exoplanet atmospheric chemi ...

Assuming intelligent aliens know how to harvest energy from stars, would humanity be able to spot these high-level structures ...

Beyond that, in the decades to come, we might be able to see the colours of an exoplanet’s surface, and determine if plant ...

Shaped by a different biology or culture, other intelligent civilisations – if they’re out there – might understand the ...

Bring up aliens and a lot of people will scoff. But not everyone is laughing. Around the turn of the century, 3.8 million people banded together in a real-time search for aliens — with screensavers.

One obstacle to figuring out why, exactly, parts of the American government have developed a strange fascination with “unidentified aerial phenomena” and “nonhuman intelligence” — in lay terms, ...

WASHINGTON (AP) — President Donald Trump said Thursday that he’s directing the Pentagon and other government agencies to identify and release files related to extraterrestrials and UFOs because of ...