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In a photo provided by the University of Mississippi, five-year-old Reyna Woolworth of Oxford, Miss. uses a Van de Graaff generator to make her hair stand on end at the Univeristy of Mississippi Physics Department Halloween night on Friday, October 26, 2007.  The event featured numerous scientific displays aimed at teaching area children about such subjects as electricity, sound waves and magnetism. (UM IMAGING SERVICES/NATHAN LATIL)