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"The Chestburster rapidly matures to an adult phase (within a matter of hours), shedding its skin as it grows and replacing its cells with polarized silicon" - DVD commentaryXantospoc said:Are Xenomorphs REALLY silicon based? All I could find on the wiki is thattheir outer shell is Silicon. They do feed on us during embryo stage
Well at least their exoskeleton is. I heard they consume inorganic materials such as metal and glass to develop their external and internal skeleton according to the Alien novelization. They may also consume organic materials to produce resin and perhaps internal organs as well.