Skull Study Suggests at Least Two Groups Colonized Americas

The 7,500- to 11,000-year-old remains suggest the oldest settlers of the Americas came from different genetic stock than more recent Native Americans. Modern Native Americans share traits with Mongoloid peoples of Mongolia, China, and Siberia, the researchers said. But they found dozens of skulls from Brazil appear much more similar to modern Australians, Melanesians, and Sub-Saharan Africans.