Science fiction film is always favored by the audience. Every year, the hottest movies must belong to the theme that search the universe. Aliens in the movies have been described into some evil creatures that try to destroy the earth. No one can make sure whether there is another life exists in the universe, but the movies probe this question all the time. I have seen many documentaries about searching aliens. Though the scientists never saw the real life, I still believe that life besides human beings, life must exist in the universe. The earth is just one of the small galaxies in the infinite universe and we know little about it. The searching of another life someday will make breakthrough and we can see what else besides earth, or we will find the creature with high IQ.