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Nat Geo Secret History of UFOs ¦ 720p

From military reports and radar readings to pilot accounts and eyewitness testimony, sightings of Unidentified Flying Objects have captured the public's fascination for decades. Despite hundreds of photos and videos of purported UFOs, we still have no scientific proof we're being visited by extraterrestrials—Do UFO sightings deserve scientific study? Or can the phenomenon be explained.



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