The term UFO was first used in the 1950s in reference to reports from the U.S. Air Force.
The term UFO doesn’t refer to aliens, just the flying objects.
UFOs have been written about for centuries.
Some ancient UFOs have natural explanations
An apparent UFO battle was reported in 16th-century Europe.
People in America started reporting UFO sightings as early as the 17th century.
The most famous UFO incident of all time occurred near Roswell, New Mexico.