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 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 ...

Critics say the technique used by researchers can't reliably show scans that deep into the ground. But scientists insist the ...

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 ...