Some exceptionally unsettling elements were thrown together to create the Xenomorph when it first appeared in Ridley Scott's 1979 horror sci-fi, "Alien." Spliced from the nightmares of artist H.R.

Over four decades, the Alien franchise has brought many different versions of the xenomorph creature to theaters.

It was once described by the severed head of Ian Holm as "the perfect organism," and that certainly followed through in the appearance of Ridley Scott's "Alien." A biomechanical-like monster that has ...