A flying saucer, or disc-shaped unidentified flying object (UFO), emerged in 1947 after pilot Kenneth Arnold described objects moving "like a saucer skipping across water." This term quickly became associated with extraterrestrial speculation, though authors like Lyle Gifford Boyd examined sightings as natural phenomena or hoaxes, while Frank Scully crafted stories of alien encounters.
Edward J. Ruppelt observed the term’s widespread use to describe any unexplained aerial occurrence. Over time, specialists connected most reports to weather balloons, optical illusions, or military experiments, yet the saucer remains a cultural icon from the Cold War era, linking scientific investigation with speculative fiction.