An American zoologist put a large mirror in front of a chimpanzee's cage to observe their response. They can recognize themselves from the mirror and often look for the part of their body that they can't usually see in the mirror. Close relatives have no such ability. From this we can infer:. ['Chimpanzees are more capable than gorillas in some ways.', 'Chimpanzees and gorillas are closer, but they still have better intelligence.', 'This ability of the chimpanzee is related to the environment in which it lives.', 'There are other animals in the animal kingdom that have this ability.']