I've always liked the idea that the xenomorphs' adaptability is what makes them the perfect organism. It's not necessarily that they can kill anything, it's that they can survive anything. They can canonically function just fine in an atmosphere of pure chlorine or even no atmosphere at all, they can be frozen at the bottom of the ocean for years and emerge completely unscathed, they don't age, no disease exists that can slow them down, as best as we know they can survive off of zero food or water, they're evidently fireproof, they seem to like radiation, one gets dunked in molten lead and still keeps on ticking and despite the facehugger method being what they're most famous for, they can even adapt to reproduce in totally different ways when the situation calls for it. They are the embodiment of the ancient axiom that life uhh finds a way. Much to the grave misfortune of all other life in the universe.












