>>507964984 (OP)
Nowhere does it say they have a high %. It says there's traces. It says it on the tin: the admix happened before humans left Africa. So
>main wave of modern humans expand
>reach West Africa and mix with whatever is there, probably more primitive variant of homo sapiens, who didn't have what it takes to expand
>MORE intra-African migration happens, this time spreading the primitive populations' genes as well
>THEN the populations split for good
"Ghost DNA" in blacks is a huge %, last time I checked.
Another thing is this isn't so much "Africa" as whatever boundary the original humans moved in. So it could be smaller or larger (Africa plus Levant or even plus Balkans and Caucasus, for example)
