Longtime researchers have known that there is a six- to seven-year up-and-down UFO sighting cycle. During this cycle the UFO sightings seem to rise incrementally from a baseline number, hit a peak, then decline back toward the baseline. Then the process typically starts all over again.
Using newly compiled numbers based on NUFORC (National UFO Reporting Center) and MUFON (Mutual UFO Network) sighting databases, we now have a national picture of sightings spanning the first 17 years of the 21st century.
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