In the 35 years since Giger's terrifying, implacable space alien first stalked the ragtag crew of the Nostromo, sequels and spin-offs have slowly but surely neutered the once unkillable beast by ...

Add Yahoo as a preferred source to see more of our stories on Google. Happy Alien Day! And no, not for any supposed extraterrestrial beings watching from the shadows of our solar system, but for the ...