"Dancing Plague" still puzzles scholars

On a street in Strasbourg, France in the summer of 1518, a woman began a fervent 6-day dance that led to a month-long dancing frenzy by more than 400 people. Modern scholars are still undecided about what caused the "Dancing Plague."

Both medical and psychological reasons have been attributed to the dancing which was preceded by several years of famine, hot summers and cold winters.