Over time new discoveries changed West African culture. The most imporant discovery
happened around 500 BC when West Africans learned how to make tools out of iron. The first
people to use this technology were the Nok people. The Nok lived in modern-day Nigeria. They
used iron to make better farm tools to grow more food. With iron tools, people could cut down
trees and make more land useable for farming. They also used iron to make stronger weapons.
With more resources, the people had surpluses that they could trade.