He recently completed a book about how the history of archaeology in Africa has shaped the way we understand the past. In my book, I divided the practice of archaeology in Africa into four phases: the early years, the emergence of archaeology, a coming of age, and archaeology's diaspora across Africa. Read more: Colonialism in Africa: archaeology offers a deeper viewThe second world war brought about a technological leap. In east Africa, potentially more than a quarter of the Unesco World Heritage sites are at risk of flooding or erosion. Reviewing scientific papers of African research shows that the vast majority are authored by people from Europe and North America.