1. Department of Anthropology; University College London; London WC1 E6BT United Kingdom
2. Institute of Cognitive and Evolutionary Anthropology, University of Oxford; Oxford OX2 6PN United Kingdom
3. School of Natural Sciences and Psychology; Liverpool John Moores University; Liverpool L3 3AF United Kingdom
4. Ugalla Primate Project, PO Box 108; Uvinza Tanzania
5. RLAHA, School of Archaeology, Leverhulme Trust Early Career Fellow; University of Oxford; Oxford OX1 3QY United Kingdom