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#UFO #Aliens UFO? Are they visitors from another world? Where have famous sightings happened? Although people have claimed to see strange objects in the sky for much of human history, UFO is a fairly new term. It’s an acronym (a word formed from the initial letters of a set of words) that stands for Unidentified Flying Object. The term first appeared in the 1950s, and up until then these weird objects were known by another name: flying saucers. This is because many of the sightings described floating, di
