Jean-Loïc Le Quellec is a director of research at the CNRS and a researcher in the Centre d’études des mondes africains (UMR 8171, Université de Paris-I) and Honorary Research Fellow in the School of Geography, Archaeology and Environmental Studies, University of the Witwatersrand (Johannesburg 2050). He has written numerous books on Saharan rock art. He has just published Des Martiens au Sahara (Martians in the Sahara) and is preparing with Bernard Sergent a dictionary of mythology.