The latest finding from NASA's planet-hunting space telescope, Kepler, has scientists talking -- and they're stumped. "We've ruled out the usual suspects and are scratching our heads and can't figure ...

A scientist at the University of Glasgow has delved into the possible existence of ...

The world was electrified last year when it was suggested that scientists had spotted an “alien megastructure” orbiting a distant star. Now a space boffin has suggested huge extraterrestrial ...

The curious minds at What If reveal the top three coolest space megastructures, imagining the mind-blowing engineering feats ...

A story that went viral this week reports that astronomers finally found E.T., but those aren't the facts. CNET's Eric Mack talks with the astronomers involved about what is still a very interesting ...

A European Space Agency catalog of the Milky Way's billions of stars could be hiding evidence of highly advanced alien civilizations with serious building skills. Eric Mack has been a CNET contributor ...

Some day in the far future, it’s possible our descendants will kick it up a notch and wrap the entire Sun in a massive solar-collecting shell known as a Dyson Sphere. It’s also possible that some ...