1. Leverhulme Centre for Human Evolutionary Studies, University of Cambridge, Cambridge CB2 1QH, UK.
2. Human Origins Program, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, USA.
3. Department of History and Archaeology, Karnatak University, Dharwad 580 003, India.
4. School of Social Science, University of Queensland, St. Lucia, Queensland 4072, Australia.
5. Research Laboratory for Archaeology and the History of Art, University of Oxford, Oxford OX1 3QY, UK.