.Bronze Age

The term Bronze Age refers to a period in human cultural development when the most advanced metalworking (at least in systematic and widespread use) included techniques for smelting copper and tin from naturally-occurring outcroppings of copper ores, and then smelting those ores to cast bronze. These naturally-occurring ores typically included arsenic as a common impurity. Copper/tin ores are rare, as reflected in the fact that there were no tin bronzes in western Asia before 3,000 B.C. The Bronze Age forms part of the three-age system for prehistoric societies. In this system, it follows the Neolithic in some areas of the world. In many parts of sub-Saharan Africa, the Neolithic is directly followed by the Iron Age]. In some parts of the world, a Copper Age follows the Neolithic and precedes the Bronze Age.