Villagers have also mistaken ordinary decomposition processes for the supernatural. "For example, though laypeople might assume that a body would decompose immediately, if the coffin is well sealed and buried in winter, putrefaction might be delayed by weeks or months; intestinal decomposition creates bloating which can force blood up into the mouth, making it look like a dead body has recently sucked blood," writes LiveScience's Bad Science columnist Benjamin Radford. "These processes are well understood by modern doctors and morticians, but in medieval Europe were taken as unmistakable signs that vampires were real and existed among them."
There's no consensus yet on when the bodies found in Poland were buried. According to Jacek Pierzak, one of the archaeologists on the site, the skeletons were found with no jewelry, belt buckles, buttons or any other artifacts that might assist in providing a burial date.
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