My theory on the black americans ancestry…

We know now that the world has had several sivilications over time and people has moved around. They found egyptian evidence in great canyon in usa and even pyramids. And they have found other evidence of Tartaria but where is Tartaria and what happened to it? So back to the ancestry of the black american: I think that they have been in usa for millennias. I don’t think they come from africa at all. The looks and appearance says africa, but their evolution tells otherwise. Let me correct myself here: once upon the time they DID come from africa only they came there much much earlier and evolved there. There was also slavetrading and they brougth a lot of them over from Africa, but there where a lot of native blacks in America. Because in Africa you can’t mix the bloodtypes from black and white, but in America you can! So that tells me a lot to. And during Colombus era and up to 1898 they killed 100 million latinos wich is indians from south america, central america and north america, blacks mixed in and their own tribes. Because they found egyptian evidence in the Great Canyon and I believe they had black people with them back then. These are the ancestors of the blacks in america. Now this is just a theory but it holds some valid to it i think.