Pre-Inca Ruins Emerging From Peru's Cloud Forests John Roach for National Geographic News September 16, 2004 On the eastern slope of the Andes mountains in northern Peru, forests cloak the ruins of a pre-Inca civilization, the size and scope of which explorers and archaeologists are only now beginning to understand. Known as the Chachapoya, the civilization covered an estimated 25,000 square miles (65,000 square kilometers). The Chachapoya, distinguished by fair skin and great height, lived primarily on ridges and mountaintops in circular stone houses. Sean Savoy, leader of the Gran Saposoa-El Dorado IV Expedition (July-August 2004), points out a stone...