UFO is the acronym for Unidentified Flying Object, which refers to any apparent anomaly in the sky that is not readily identifiable to the observer as any known object. Originally referred to popularly as "flying saucers" during the late 1940s, the term UFO became more widespread during the 1950s, initially among interested professionals and later in popular culture. Associated with extraterrestrial life and/or conspiracism in popular culture, UFOs serves as fetishes for multiple anxieties.

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