Lost Kingdoms of Africa: NUBIA -  British art historian Dr Gus Casely-Hayford explores the pre-colonial history of some of Africa's most important kingdoms.Casely-Hayford traces the origins of this fascinating kingdom back to 10,000 BC. He explores how it developed and what happened to it and its people, discovering that its kings once ruled Ancient Egypt and that it was defeated not by its rivals but by its environment.