Past research in the Acacus mountains has been mostly concerned with studies of rock art (Mori 1965) and site-oriented investigations, particularly rock-shelters in the central and northern Acacus (Uan Muhuggiag: Mori 1965; Barich 1987; Ti-n-Torha North: Barich 1974; 1987; Wadi Athal: Barich & Mori 1970). This important research disclosed the astonishing archaeological richness of the area. Particular emphasis was given to data suggesting the existence of early forms of pastoral economy in the region (Mori 1961; 1965; Barich 1987). This led to the hypothesis, differently and repeatedly formulated, of a Saharan focus for the emergence of food-producing activity, based on cattle herding, independent from the Nile Valley and the Near East (Mori 1961; Barich 1987). This is not the place to discuss in detail this interesting, but now largely discarded, hypothesis; what is important to underline, however, is the limited database used in its formulation. The results of only three excavations, all located in the mountain ranges, provided the basis of the evidence presented without any attempt to place these sites in a broader regional framework.