When you buy through links on our articles, Future and its syndication partners may earn a commission. E.T., Stitch, Chewbacca, Groot — humans have a lot of ideas about what aliens might look like.

E.T., Stitch, Chewbacca, Groot — humans have a lot of ideas about what aliens might look like. But what is the science behind extraterrestrial life? Is it possible that humans will ever experience ...

Since Alien first hit theaters in 1979, the famed sci-fi franchise has grown exponentially over the years. From its sequels to famed Predator crossovers and now, the first television series, Alien: ...