A Zimbabwean archaeologist reimagines the story of an African civilisation
A 250 meter long wall 11 meters tall is far from "triumph of engineering" even in 1200. "Drainage channels" are far from "evidence of a sophisticated civilisation". They could even be naturally formed by water along the unpaved ground and other parts of the world had sewer systems a lot earlier. I could go on and talk about 10k people and so on...Why? Why do they feel the need to do this?