Ripleys escape

Thadus 12
MemberOvomorphAugust 17, 20111189 Views21 RepliesI remember reading somewhere that the only reason Ripley is able to defeat the Alien is that it was engineered to only have a limited life span.It does seem sluggish at the end of the film. This does make sense i suppose, the space jockies use these 'Bio-weapons' to do a job and then they expire,leaving the space jockies nothing to clean up i.e. dangerous Aliens running free.
What are your thoughts on this concept?