Prometheus created humans out of clay and stole fire from Mount Olympus to help humanity. Angered, Zeus tricked Prometheus by having him choose animal parts for sacrifice. Prometheus selected the inedible bones for the gods and the meat for humans. As revenge, Zeus created Pandora and had her unleash sickness and troubles upon humanity. Prometheus was then chained to a rock by Zeus and tortured daily by having his liver eaten, but was eventually freed by Heracles.