Saw this film earlier this evening and I'm confused. There's a few things I can't get my head around, perhaps somebody could explain. Also, don't read any further if you haven't seen the film. Spoiler What is that stuff the engineer drinks and why does he drink it? I get that it's to create life but it still doesn't make a lot of sense. Where do all these different xenomorph's come from. The 'facehuggers' obviously come from the worms. That big tentacled thing comes from the offspring of humans and the alien comes from the engineer. In the original Alien the alien creature comes from a human, you see the confusion. Also, what was it that attacked the engineers, where did it come from and where did it go?