That now classic tagline (from Alien, one of the greatest science-fiction horror movies ever made) hinges on a big assumption that most of us broadly make: space is empty. And it is—mostly. But there ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: FX / Hulu "In space," some marketing genius once said, "no one can hear you scream".

A 'hostile' alien spacecraft could be on course to attack Earth in November, reveals a controversial new study. A small group of scientists have raised concerns about a mysterious intergalactic object ...