Currently Sarah Tishkoff has stated that while Africans have the highest intra population variability in DNA Native America has the largest inter populational variability. Relethford and Manica have both pointed out a correlation between craniofacial variability and intrapopulationally and genetic varibility. It is possible this may be so in inter populational variability as well. Dr Gonzalez Jose and others have noted a dichotomy of cranifacial variability in the Americas.