This year marks the 40th anniversary of the film “Alien” by Ridley Scott, where a creature called a ‘xenomorph’ attacks and eats the entire space crew except for Sigourney Weaver’s character. (see ‘Alien’ 1979 movie trailer below) But as movie making has developed and as modern science has changed, so has the industry’s idea of what an alien would probably look like. ‘The days of little green men and giant scaly monsters in alien movies are over.’