Mutual sex on camera
Not too long ago the savanna baboon was regarded as the best living model of the human ancestor.
That primate is adapted to the kinds of ecological conditions that prehumans may have faced after descending from the trees.
Traits that are observed in chimpanzees--including cooperative hunting, food sharing, tool use, power politics and primitive warfare--were absent or not as developed in baboons.
(Given the species slow rate of reproduction, the rapid destruction of its tropical habitat and the political instability of central Africa, there is reason for much concern about its future.) If this evolutionary scenario of ecological continuity is true, the bonobo may have undergone less transformation than either humans or chimpanzees.