... difference hypothesis in which bonobos should socially groom in face-to-face position and groom the face and frontal areas more than chimpanzees due to their difference in social attention (i.e., bonobos make more eye contact than chimpanzees); another is the environmental constraints hypothesis in which...

... with broad central basins and the third lower molar is reduced in size. Table 3. Summary of fossil ape environments showing type of evidence for reconstructing environments and the environmental reconstructions At one site on Rusinga Island (R3) the dense remains of tree stumps and roots...

..., and these techniques offer new opportunities to build upon existing understandings of baboon ecology. This paper will focus on 2 specific questions, both prominent in the existing literature (see above): (a) whether there is a ‘typical' environment for each species and how they differ, and (b) how much environmental...