GLIWICE, POLAND—Four decapitated skeletons have been unearthed in southern Poland. The heads had been placed between the legs of the bodies, in accordance with folk beliefs that such treatment would prevent a possible vampire from coming back to life. No artifacts were found in the graves, so further testing will be necessary to determine their age. “It’s very difficult to tell when these burials were carried out,” said archaeologist Jacek Pierzak.