Because you don't understand it, you want to kill it.

An alien ship crashes into the desert, at first it's thought to only be a meteorite, but small time scientist Richard Carlson gets to view the stricken ship before it is totally buried beneath the collapsing crater it created upon its crash landing. Nobody believes Carlson, but soon the aliens start taking on human form and it's then that everyone else must sit up and take notice before it's deemed too late.

It Came From Outer Space stands as one of the better sci-fi pictures to come out of the Cold War 1950s. Based on the Ray Bradbur... read the rest.