Eric Walker added Ancient DNA confirms Native Americans’ deep roots in North and South America | Science | AAAS to a number of topics
Eric Walker added a number of topics and a number of links to Ancient and historical human groups, and added Ancient and historical human groups to Races and ethnic groups and Ancient, classical, medieval and enlightenment history
Eric Walker added a number of topics and a number of links to Native Americans, and added Native Americans to Races and ethnic groups and United States