water seen in the Atacama in the form of permanent or seasonal streams originating in the high Andes, located around 100-150 km to the east (see Figure 13.1). This supporting network of water sources and the Pacific Ocean, one of the richest and most diverse marine biomasses in the world, creates unusual conditions allowing for the permanent occupation of this area by hunter-gatherers and fishermen. The first known inhabitants who arrived on the Pacific coastline of this region initiated a subsistence system that after 2,000-3,000 years of experimentation became strongly dependent on a wide variety of marine resources, hidden under the waves of the Pacific (Bird 1943;Llagostera 1992;Nu ´n ˜ez 1983;Schiappacasse and Niemeyer 1984). They complemented their maritime economy with unpredictable and dispersed terrestrial resources, located along the quebradas (narrow deep canyons with permanent or intermittent courses of water) and oases touched by sand dunes swept by the desert winds.The Selknam, hunter-gatherers of Tierra del Fuego, can serve as an analogy for understanding early Atacama populations. They inhabited an extremely harsh environment, but also developed a complex ideological system expressed in sophisticated ceremonies, which included body painting, masks, and performances representing supernatural characters. These rituals helped them to maintain and pass on their ideology and promoted social and biological reproduction. Similarly, Australian desert Aborigines continue to exercise complex systems of thinking and performance through a rich iconographic rock art and curation of tjuringa (sacred boards with painted or incised motif), comprising ''a semiotic system that mediates social and territorial relations'' (Rosenfeld and Smith 2002: 112), and body painting with the ''appearance of ancestral forces'' (Morphy 1998: 23). In these