Elephants can make vocal sounds that are too low for people to hear. These sounds can travel over a mile! We are learning that elephants can also feel vibrations in the ground that give them an idea of things that are happening far away. For example, just before a terrible tsunami hit Thailand in 2004, trained elephants took off running for higher ground well before people knew anything was wrong. The elephants saved their own lives and the lives of the tourists on their backs!