1. Great Apes : Great Apes are by far the smartest animals on earth, they include both our cousins, the chimpanzees but also humans. Chimpanzees are closely related to humans, and we even share 98% of the same genes. Chimpanzees have been observed making and using their own tools, they can also be taught how to use human tools. Humans have also succeeded in teaching chimps sign language, and simple mathematics. Chimps hunt collectively and can solve advanced problems. Chimps also have complex social life’s, where they form strong bonds, and observe and elaborate hierarchical structure.