John Locher/AP
In this Sept. 21, 2019, photo, a man looks at the “black mailbox” near Rachel, Nev. The mailbox along Nevada Highway 375 is traditionally a spot UFO hunters met to search the skies near Area 51. (AP Photo/John Locher) 
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For decades, the existence of aliens has been a fascinating topic for people around the world, inspiring art, architecture and social gatherings.
