That's a pity. That would be interesting to see how the "Nok culture civilizations" interacted with Carthage and Rome. That's the most exciting aspect for me. If we had prosperous civilizations on both sides of Sahara that would lead to better exploration and development of the region. Considering the gold resources of West Africa and other mineral and natural riches the history of this part of the world would change tremendously.The timeline will end in 600 BC, BTW, although there'll be some hints as to what happens later.