Whether it is the 1951 or the 2008 version of the movie is being talked about, both movies, even in the introduction, have pictured the visit of extraterrestrials in a way that is not different with the real sightings experienced in this day and age. Unexplainable balls of light come down from the sky and land in places where no man knows. Who knows if aliens actually reside with us? We do not know for sure. But there is one thing guaranteed. We are never alone in this universe and anything can visit this planet without is having any clues.