According to a statement released by the University of Exeter, traces of 76 stone chacus, or funnel-shaped traps, have been spotted in satellite images of northern Chile by Adrián Oyaneder of the University of Exeter. The dry-stone walls of the chacus stretch downhill for hundreds of yards, and end in pits surrounded by enclosures. Hunters would have driven vicuña into the traps and then collected them from the pits. Oyaneder noted that the trap builders sometimes employed natural features in the landscape as arms of their traps. He has also found evidence of settlements in satellite images of Chile's Western...