" 

 : Again with confusions. Diop did not do ""DNA"" tests on mummies. He attempted to extract melanin from skin to prove they were black. I don't know what this mysterious DNA testing is that ""silence speaks volumes as to why it hasn't [been done]"". Do you mean extracting DNA from ancient bones? It's not easy to do that. DNA degrades over time. Do you mean testing modern populations to model ancestry? That is being done, but actually there is often resistence from indigenous peoples who suspect some sort of experimentation is being performed on them. See this response to the Human Genome Diversity Project, an attempt to create a genetic map of all human populations . Your comments about visible features just indicate how enthralled you are by an archaic model of race, a model which actually justifies racial hierarchies. Only by taking the view that modern Africans, Aboriginal Australians etc are somehow ""stuck"" in a racial identity formed 50,000-70,000 years ago that has never changed can you really argue for commonality between these peoples, even then you are saying nothing about direct contacts between Africa and Mesoamerica. Such a view simply reinforces the old idea that black-skinned people are ""less evolved"" than other people, since, unlike others, apparaently they all remain ""the same race"" over tens of thousands of years. This view, btw, is not supported by genetics.  "