Modern medicine has seen more development in the past 50 years than in all of human history combined. Many long-practiced medical treatments now seem completely bizarre in retrospect - things like putting animal dung on a wound, drinking urine, carving holes in your skull, or drinking medicinal potions made of morphine or mercury. But which practices are considered the most peculiar from all of human medical history? Which practices were once used as medicinal treatments only to be later found incredibly dangerous?