Ambiguity Debate - Q4 - Drones & Warriors

Very often we have seen members, and staff, claim that Prometheus and the Alien franchise (and other franchises that may or may not be part of the same universe) have very few certain facts, and that everything else is open to interpretation and speculation, therefore being ambiguous. Is this true, or is it just a simple case of reading between the lines and unraveling the puzzles to reveal the facts. So, in this debate we may or may not dispel the alleged ambiguity of aspects of this universe. Therefore, I ask the following question(s)... [u]Questions[/u] Q1 - How long does it take for a Chestburster to mature into an adult Alien? [b]FACT - Less than 1hour.[/b] Q2 - How, and with what does a Facehugger impregnate its host? [b]FACT - Upon locating a host the Facehugger coils its long tail, launching itself at the host’s head, gripping with its legs and tightening its tail around the neck; the Facehugger suffocates the host. Upon rendering them unconscious, the Facehugger extends a proboscis into the host’s throat, supplying breathable air and nutrients while implanting its EMBRYO. Once the embryo is securely attached inside the host’s chest cavity, the Facehugger retracts its proboscis and dies.[/b] Q3 - What caused the death of the Engineer seen inside the derelict Juggernaut in Alien? [b]ASCERTAINABLE FACT - Juggernaut in flight over/near LV-426 - Egg hatches, sensing pilot above - Pilot is facehugged -Juggernaut forced to land on LV-426 - Pilot awakens and transmits signal/beacon - Chestburster born.[/b] Q4 - What is the difference between the domed-head Aliens or Warriors (Alien, Alien 3, Alien Resurrection & AVP ) and the ridge-head Aliens or Drones (Aliens and AVPR). Q5 - How big is the dead Engineer inside the Derelict seen in Alien? Q6 - Is the egg-morphing form of Xenomorph reproduction seen in Alien part of the creatures lifecycle? Once we have, or do not have, an universally accepted answer for the last question(s) (which will be posted underneath the question), we will move onto a new question(s), and so on... But beware, sometimes there may be trick questions, or will there be? [center](This thread will help us, the staff, compile a series of FAQ's)[/center] NOTE - We are all aware of some peoples opinions on the AVP movies, but they will only be cited when needed, the aim of this thread is to get the answers, or the best answers to the questions to compile FAQ's for all the movies, not just Prometheus, hence why this thread is in the Alien Discussions board and not the Prometheus Discussions board.