Star Trek: Discovery explores our corner of the block -- just a fraction of the galaxy. Some stars are better candidates for intelligent alien life, and it may not be anything like we imagine.
Ripley beat the patriarchy and a rampaging xenomorph - but Daniels isn't even given the chance.
The latest outing of the Alien film franchise pits another human crew against a terrifying enemy. But how does the science stack up?
New sci-fi movie has a fascinating approach to an old question.