So if Predators taught Humans everything, I'm guessing they gave Engineers the technology to create humans, and maybe stole alien eggs to harvest for themselves. Idk just a random thought, I really liked the movie tho, but the beginning is still puzzling, after the engineer took a (shot of death) and a ship was hovering about 100ft above, I didn't get that.
Oh and if you haven't seen the movie and don't like spoilers, then don't go reading through a Forum Board DUHHHH!!