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Neil deGrasse Tyson explains why some people see ghosts

Rob Ludacer,Rob LudacerOct 31, 2016, 19:40 IST

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Up to 18% of Americans say they've seen a ghost, and there might be scientific explanation for it. A specific tone, called the 'ghost frequency' could create a vibration that shakes the eyes and creates visual distortions.

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