I focus on the archaeology of the Pleistocene and at the beginning of the Holocene and while trying to integrate data from genetic and of physical anthropology studies. As a lithic specialist, I study the material culture of Pleistocene hominins to address issues related to subsistence strategies, cultural geography, and population dynamics. Working on the peopling of Asia by Modern Humans, Neanderthals and the Denisovans, I consider late Pleistocene hominins as mobile hunter-gatherers responding to a complex and changing physical geography and environment. As a field archeologist, I participated in numerous Paleolithic excavations from Western Europe to the Tian Shan, including sites in western Russia, in Iran, or Uzbekistan. Since 2011, he has co-directed an international excavation project at numerous Paleolithic sites in the Ikh-Tulberiin Gol, north Mongolia. I also participate in international projects on the Paleolithic of north China (Ningxia Province) and on the tool use by capuchins in Panama. Since 2018, I am co-directing excavations at the Trou al' Wesse Cave in Belgium (Liege Province) to investigate Neandertal and Early Homo sapiens occupations.