Ghana was initially referred to as the Gold Coast. After attaining independence, the country's first sovereign government named the state after the Ghana Empire in modern Mauritania and Mali. Gold Coast was initially inhabited by different states, empires and ethnic groups before its colonization by the British Empire. The earliest known physical remains of the earliest man in Ghana were first discovered by archaeologists in a rock shelter at Kintampo during the 1960s. The remains were dated to be 5000 years old and it marked the period of transition to sedentism in Ghana. Early Ghanaians used Acheulean stone tools as hunter gatherers during the Early stone age. These stone tools evolved throughout the Middle and Late Stone Ages during which some early Ghanaians inhabited caves.