More than 300 years after the Salem witch trials led to the deaths of 19 innocent people, behavioral psychologist Linnda Caporael has been searching for a rational explanation for the symptoms of bewitchment. Her work has sparked an investigation into wrenching convulsions, vivid deliriums, contaminated crops, hallucinogenic drugs, and a murder victim buried in a bog for 2,300 years. Was bread tainted with toxic fungus the real cause of the symptoms...