One of the very first narrative films, Georges Méliès's "A Trip to the Moon," is about aliens. Sure, everyone remembers that shot of a rocket ship crashing into the eye of the man in the moon, but as ...

Do aliens exist? Based on how many alien invasion movies there are, you'd be forgiven that there's gotta be some proof of extraterrestrial life—and that the aliens are out to get us here on Earth. But ...