Asia
The coastal periphery was home to some of the world's earliest known civilizations, each of them developing around fertile river valleys. The civilizations in Mesopotamia, the Indus Valley and the Yellow River shared many similarities. These civilizations may well have exchanged technologies and ideas such as mathematics and the wheel. Other innovations, such as writing, seem to have been developed individually in each area. Cities, states and empires developed in these lowlands.
Chimú culture
The oldest civilization present on the north coast of Peru is the Moche or Mochica civilization, which is identified as Early Chimú. The start of this period is not known for certain, but it ended around 700 AD. It was centered in the Chicama, Moche, and Viru Valleys. "Many large pyramids are attributed to the Early Chimú period." (37) These pyramids are built of adobe in rectangular shapes made from molds. "Early Chimú cemeteries are also found without pyramid associations. Burials are usually in extended positions, in prepared tombs. The rectangular, adobe-lined and covered tombs have niches in their walls in which bowls were placed." (39)