Colonizers took the items after a deadly battle in the late 19th century
The building complex was likely the seat of Christian power for Makuria, which was once as large as France and Spain combined
Some 13,400 years ago, rival communities in the Nile Valley likely clashed over scarce resources
Researchers cite a "total lack of quantifiable data on the impacts of climate change on heritage in sub-Saharan Africa"
Rising water levels could damage ancient structures at Meroe and Nuri
Illegal gold diggers dug an enormous trench at Jabal Maragha in the eastern Sahara Desert
The African nation's pyramids and other archaeological sites are only now emerging from the shadow of its more storied neighbor to the north