Thanks to the prequel's controversial changes to Alien's canon, Ridley Scott's most divisive franchise entry left some major questions unanswered.

We may receive a commission on purchases made from links. Are we alone in the universe? It's a huge question with no easy answer. And, following on from that, if we aren't alone, what would beings ...

Prometheus, the divisive but brilliant 2012 prequel to the legendary Alien sci-fi franchise, has just been added to Netflix.