Pre-Dorset Culture - Archaeology - About.com
The Pre-Dorset culture is a North American arctic culture of Greenland and
Canada, first appearing there about 4500 years ago; the people probably arrived
Beringian Standstill Hypothesis - Land of the First Americans
... (Pre) History of Clovis - Early Hunting Groups of the Americas · Snow Houses -
Innovative Architecture of Eskimo People · Guide to the American Arctic Culture.