João Marreiros is an archaeologist working as a post-doctoral researcher (FCT-grant) in the Interdisciplinary Center of Archaeology and Evolution of Human Behaviour (ICARhEB), Universidade do Algarve (Portugal) and in the Departamento de Arqueología y Antropología de la Instituición Milà I Fontanals, del Consejo Superior de Investigacionres CIentíficas (CSIC, Catalonia). He’s research focuses stone tools technology and functionality from the Early Upper Paleolithic in Western Europe, particularly on techno-typological and use-wear analysis of lithic tools from the Early Upper Paleolithic industries from Iberian Peninsula with special interest in human ecological behavior and the first evidences of Anatomical Modern Humans industries in this region. He, in collaboration with the other two editors, organized the International Conference on Use-Wear analysis 2012, held in Faro (Portugal). Juan Gibaja received his PhD in Archaeology & Prehistory from Universidad Autónoma de Barcelona in 2002. From 2006-2011 he worked as a post-doctoral fellow at the Universidade do Algarve (Portugal) funded by Fundação para a CIência e Tecnologia (FCT). Currently, since 2011, he is an Ramón y Cajal researcher at the Departamento de Arqueología y Antropología de la Instituición Milà I Fontanals, del Consejo Superior de Investigacionres CIentíficas (CSIC). During the last decade, he headed several research projects focus on lithic use-wear analysis. His research focuses on the key transition phases from Late and Early Prehistory: the transition between the last Neanderthals and anatomically modern humans and the transition from the last hunter-gatherers from the Mesolithic to the first farmers of the Neolithic in the Occidental Mediterranean. Nuno Bicho received his Ph.D. in Anthropology from Southern Methodist University in 1992. He is currently an Associate Professor of Archaeology at the Universidade do Algarve, Portugal. He was Deanbetween 1998 and 2001 and 2005-2007. In addition, Bicho is the Director of the Interdisciplinary Center of Archaeology and Evolution of Human Behaviour at the University of Algarve. He specializes in Paleolithic ecodynamics and his research focused on prehistoric costal hunter-gatherers of southern Iberia for the last two decades. More recently he has also developed research on the Mesolithic of the Tagus Valley and on Middle Stone Age of Mozambique.