Very much believe the early Sumerians were black, but some are still trying to toss out they were just talking about their hair when they were called the black headed once
It's possible. Genetic data suggests that the original British were likely black as recently as 10,000 years ago. If the transition in skin tone could go from black to white in just 10,000 years, its not out of this world that the transition from black to brown/tan could happen within 6000 years.
How accurate are those models? I always get a sense we get hyped up over speculation without really having a way to know how accurate these models are
Technically that's still a model. What else would you call it?
But I didn't know we were at the point where we could ascertain that much about race from dna samples. The way these academics still fight about various reproductions of how pharoahs and kings looked doesn't make it seem any more certain