1. Departament de Humanitats, Culture, Archaeology and Socio-Ecological Dynamics, Universitat Pompeu Fabra, Barcelona 08005, Spain
2. Department of Archaeology, Simon Fraser University, Burnaby, BC V5A 1S6, Canada
3. Department of Archaeology and Heritage Management, Aksum University, Aksum 7080, Ethiopia
4. School of Geography, Archaeology and Environmental Studies, University of the Witwatersrand, Johannesburg 2000, South Africa
5. ICREA, Catalan Institution for Research and Advanced Studies, Barcelona 08010, Spain