The Indians of America is absolutely dominated by Group I of blood, and that they have other groups suggests mixed with Caucasians or negroid, appeared in the New World after Columbus. This shows that colonization of America carried people with high blood concentration of I group. In 1955, a typical indicator that after the boy called Diego factor was discovered in the blood of a Peruvian boy. The most common factor Diego found the Indians of South America, which, according to anthropologists, to a greater extent preserved archaic features Paleo-Indians. From ten to forty percent of the South American Indians have this factor in the blood. The Indians of North America Diego- factor below, only five - ten percent have them. Most traces of registered Diego factor in the Japanese, Korean, Burmese, Chinese and other peoples of the East and South-East Asia. The population of Australia, Oceania, most of Asia and evropeytsevDiego factor is not detected. This again speaks of the long isolation of American Indians - and that its settlement went from Asia through Beringia.