Kind of like the movies Alien and Predator and all the other movies in those series. The original "Alien" movie took place in the future, the original predator took place in the 80's, AVP takes place in the modern day. So technically everything that happened in Predator and AVP took place way be before Segourney Weaver first found the Alien since that movie took place in the future. I'm sure I'm making no sense.