U.F.O. - An acronym for Unidentified Flying Object. Most of the time it is associated with alien vehicles. Stories throughout history involve UFO's, From the Mayans, to the Bible, believe it or not. Ancient peoples told of how people came down from the sky and taught them things, and how they were worshiped afterwords by the peoples who they visited. However, back then seeing something in the sky was much more noticible than today, with all of the airplanes, weather balloons, and other junk up there. But still people report seeing saucer shaped objects, and the pictures have appeared in rennisance work involving bible scenes. In the background, in the sky, ins the picture of a saucer of some kind in most of them. In the bible it tells how God destroied cities on the earth with fire from the sky, now it is specilated to be nuclear weapons from aliens. Has our civilization been this closely influenced by aliens by outerspace? You Decide...