Besides being well known for their humanlike looks and tree-climbing abilities, the great apes possess many other unique traits that make them special. Did you know chimpanzees use two stones as a hammer and anvil to crack nuts? Or that bonobos and chimps pout and grin to show their feelings? And the great apes can learn language! Read fifty fun facts about great apes that make these magnificent creatures worth saving from extinction and how you can help.