1 Gorongosa National Park, Sofala, Mozambique; Primate Models for Behavioural Evolution Lab, School of Anthropology, University of Oxford, Oxford, UK; Interdisciplinary Centre for Archaeology and Evolution of Human Behaviour (ICArEHB), Universidade do Algarve, Faro, Portugal. Electronic address: renebobe@gmail.com.
2 Center for the Advanced Study of Human Paleobiology, George Washington University, Washington, DC, USA.
3 Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, DC, USA.
4 National Museums of Kenya, Nairobi, Kenya; Department of History and Archaeology, University of Nairobi, Kenya.