Changes in blood type of native Americans Before Columbus and the European colonization of the Americas virtually no native had A or B type blood group. More from my siteHow long did it take to mummify a dead person?How heavy is the largest kidney stone ever discovered?Suicide as a test of the afterlifeBenito Mussolini’s other occupationsThe quietest room in the worldDo babies have kneecaps? 3 comments   Get Livefyre FAQ Sign in + Follow Post comment Link Newest | Oldest factcat 5pts @MargiePlatt yep. http://en.wikipedia.org/wiki/Genetic_history_of_indigenous_peoples_of_the_Americas MargiePlatt 5pts Only O??? MargiePlatt 5pts so only O??