database normalization
http://en.wikipedia.org/wiki/First_normal_form http://en.m.wikipedia.org/wiki/Caucasian_race http://en.m.wikipedia.org/wiki/Ethnic_group http://en.m.wikipedia.org/wiki/Racial_group http://en.m.wikipedia.org/wiki/History_of_anthropometry http://en.m.wikipedia.org/wiki/Forensic_anthropology