 Archaeological excavations conducted from the 1950s onwards have revealed evidence of sparse settlement by hunter gatherers in the late Stone Age, followed by a larger population of early Iron Age settlers.These later groups were found to have manufactured artifacts, including a type of dimpled pottery, iron tools and implements.Hundreds of years ago, the Twa were partially supplanted by the immigration of a Bantu group, the ancestors of the agriculturalist ethnic group, today known as the Hutus.