Apprehensive, the crowd watches as Binti Jua approaches the boy who has fallen into her pit. Acting as a loving rescuer, she cradles the unconscious boy and carries him to safety. Saving this child surprised everyone who witnessed the scene, and changed people's dominant view that gorillas are just savage beasts. Yet Binti Jua isn't the only smart gorilla in the zoo. From expressing emotions to using tools, creating art, and understanding language,...