The National Geographic Society, 1145 17, St NW, Washington DC, 20036
Centre for the Exploration of the Deep Human Journey, School of Anatomical Sciences, University of the Witwatersrand; Private Bag 3, Wits 2050, South Africa
The Carnegie Institution for Science, 5241 Broad Branch Road NW Washington D.C. 20015
Department of Anthropology, University of Wisconsin, Madison; 5240 Sewell Social Sciences Building, 1180 Observatory Drive, Madison, WI, USA 53706
Department of Anthropology, Princeton University; 123 Aaron Burr Hall, Princeton USA 08455