Diego blood antigen system points to a Bering Land Bridge origin of North American native peoples
Going by the distribution of people with ABO blood types, it appears that the indigenous peoples of the Americas–North, South, and Central–could not be descended from Asian people who crossed the Bering Land Bridge during the Ice Age. Indigenous Americans are universally Blood Type O and Asians are for the most part Blood Type B, with very few Os. However, a new blood typing method first discovered in 1955 corroborates the Bering Land Bridge hypothesis. The ABO Blood typing system was discovered in 1900 and 1901, and relates to many other primates as well as humans.
As first glance, the distribution of people throughout the world by ABO Blood type did not seem to support a Bering Land Bridge influx of Blood Type O people, and therefore, could have meant that native Americans originally came from a now sunken lost continent in the middle of the Pacific Ocean, which some believe was called Mu or Lemuria.
A new blood typing system is called Diego “comprises 21 rare blood factors,” according to a Wikipedia article entitled, Diego Antigen System., and it supports the Bering Land Bridge theory:
Diego antigens are only found (or in some cases, only not found) in populations of Aboriginal Americans (in both North and South America) and the Mongolic peoples of East, Southeast, North-Central and Northeast Asia. Incidence of the factors is not diminished in ethnically mixed populations. Indeed, the first two Diego factors were found in people of mixed European and Aboriginal American ancestry.