Dominant civilization on the northern coast of present-day Peru in the 1st-8th centuries AD. The name comes from the great site of Moche in the Moche River valley, which was apparently the capital of the Moche peoples. Their settlements extended along northern Peru's hot, arid coast from the Lambayeque River valley south to the Nepeña River valley. They irrigated extensively, and their agriculture supported many urban centres, which featured stepped pyramids. They were skilled metalworkers and produced sophisticated craft goods, including fine mold-made pottery. The cause of their demise is unknown. See also Andean civilization