From weird lights appearing in the darkened sky to a mysterious air force base thought to contain extra-terrestrial beings, we take a look at the 6 Biggest .\r
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From hieroglyphs indecipherable even today to stories of hikers found dead in unexplainable positions, we count 15 mysteries that have yet to been solved or .\r
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Americas TOP 60 Greatest Unsolved Mysteries and Crimes 2015 documentary6 Was Pearl Harbor a surprise attack? Who pulled off the St. Valentines .\r
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Here are six mysteries that are downright creepy, and have yet to be solved. They may never be solved. I know this has been done to death by the far too many .
