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 ...

Most space habitat designs try to recreate gravity, but some visions embrace weightlessness instead. Bubble habitats and vast ...

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 ...