This is amazing work, and overall a great writeup. However, I'm puzzled by this quote: > "For example, all present-day populations show about 2% of Neandertal

This is amazing work, and overall a great writeup. However, I'm puzzled by this quote: > "For example, all present-day populations show about 2% of Neandertal ancestry which means that Neandertal mixing with the ancestors of modern humans occurred soon after they left Africa, probably around 50,000 to 55,000 years ago somewhere in the Middle East." It's my understanding that at least some African populations don't carry Neandertal etc sequences. I'd like to check the paper about that, but Sci-Hub doesn't have it yet.