Archaeologists working in the hyper-arid regions of the Atacama Desert have uncovered a sophisticated system of stone-lined basins and drainage channels designed to capture moisture from the camanchaca, the dense fog that rolls in from the Pacific. Dating back to approximately 1000 BCE, these structures represent some of the earliest known examples of large-scale fog-harvesting technology in the pre-Columbian world, allowing ancient communities to maintain sustainable agriculture in one of the driest places on Earth.
The excavation team identified a series of slanted stone catchments positioned on coastal ridges. These catchments funneled condensed water into subterranean clay-lined reservoirs. Analysis of soil samples near the site suggests that this water was used to cultivate high-value crops like chili peppers and beans, which were then traded with inland highland groups. This discovery challenges previous assumptions that these coastal populations relied solely on maritime resources for survival.