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.
Ancient history
Mesoamerican ancient civilizations included the Olmecs and Mayans. Between 2000 and 300 BC, complex cultures began to form and many matured into advanced Mesoamerican civilizations such as the: Olmec, Izapa, Teotihuacan, Maya, Zapotec, Mixtec, Huastec, Which flourished for nearly 4,000 years before the first contact with Europeans. These civilizations' progress included pyramid-temples, mathematics, astronomy, medicine, and theology.