UFO Mysteries: These Sightings Have Never Been Solved

Not so U-FOs

For every unexplained sighting, there are dozens that turn out to be military flares, weird cloud formations, weather phenomena or elaborate hoaxes. For instance, GEPAN’s database suggests that only 7 percent of all supposed UFO sightings are truly unexplained.

In the 1940s, the U.S. Air Force began investigating UFO sightings, and that program, called Project Blue Book, logged more than 12,000 reported sightings before it was shuttered in 1969. Most of those Project Blue Book sightings were ultimately explained. While a few remained unexplained, the people involved in the program were skeptical that these cases were true alien sightings or completely unknown physical phenomena.

“If more immediate, detailed, objective data on the unknowns had been available, probably these, too, could have been explained,” a report in the Project Blue Book archive noted. However, the fact that human factors are involved — in particular, personal impressions and interpretations, rather than accurate scientific data — it’s likely impossible to eliminate all unidentified sightings, the report noted.

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