The difference
between Paleoamerican and modern Native American
facial features is likely a combination of additional waves of migration from Siberia, via Beringia, and genetic drift, a gradual change in
appearance and other traits as populations divide, migrate and adapt, says Jim Chatters, a Seattle - area anthropologist who led the multinational study of Naia.
Cells in one face patch — the anterior medial patch — processed information about the
appearance of faces such as distances
between facial features like the eyes or hairline.