Martha M RobbinsMartha M. Robbins is Research Associate at the Max Planck Institute for Evolutionary Anthropology. She is coeditor of Mountain Gorillas: Three Decades of Research at Karisoke and Feeding Ecology of Apes and Other Primates. hristophe Boesch is Director of the Department of Primatology at the Max Planck Institute for Evolutionary Anthropology. He is the author of The Real Chimpanzee: Sex Strategies in the Forest, among other books. Read More Read Less