Okay, so we know that the extremely pale, almost sickly-looking Engineers hate humans: but why? At the start of Prometheus, we're led to believe that the physically intimidating race of extraterrestrials are responsible for seeding all life on Earth (and presumably other planets) by sacrificing one of their number through the consumption of a strange black goo. But why are the Engineers going to such great lengths to create life? Why do the Engineers hate their own children and why have they created them in the first place remain two of the biggest unanswered questions of the film to date, and while many fans have attempted to put forward some very convincing (if speculative) answers, we're still largely in the dark as to why they did both of these things. If the rumours that the film originally intended to feature a back-story involving an emissary visiting Earth are true, then we could possibly already have an answer to one of these. The scene in question was cut though, so its chances of still being considered canon are slim. Whichever way Scott decides to go, these two questions certainly need to be answered.