1. Bezoar stones: undigested matter found in the gastrointestinal tract of deer, goats, porcupines and other animals, once prized as magical cure-all stones, worn by royalty Arabian doctors had been using bezoars since the 8th century, and brought them into western medicine in the 12th century as an antidote to arsenic, a favorite poison used to… Continue reading at the publisher's website.