Ape years ago (Mya) the clades diverged into newer clades. The lesser apes are the gibbon family, Hylobatidae, of sixteen species; all are native to Asia. Their major differentiating characteristic is their long arms, which they use to brachiate through trees. Their wrists are ball and socket joints as an evolutionary adaptation to their arboreal lifestyle. Generally smaller than the African apes, the largest gibbon, the siamang, weighs up to ; in comparison, the smallest "great ape", the bonobo, is . Formerly, all the great apes except humans were classified as the family Pongidae, which conveniently provided for separating the human
Ape and Essence society which is much like 20th century human society, but with baboons substituted for men. The opening scene shows two Einsteins, tied to leashes held by baboons on either side of a pair of baboon armies, facing each other and preparing for battle. They are then directed to operate machines which release "improved" disease-causing clouds at the opposition. Several of the vignettes portray a female baboon singing sensually to an all-baboon audience "Give me, give me, give me detumescence..." Other vignettes involve apes performing various human activities, ape armies assembling, and other more surreal imagery. Ape and Essence Ape and