I thought the discussion generated by this thread turned out have some interesting strands. Archaeology and anthropology are interwoven and cannot be separated. I googled soemthing along the lines of 'first human inhabitants of Canada' and came up with some fascinating sites.

Try:
http://www.nowpublic.com/asian-seafarers-may-have-been-north-americas-first-inhabitants

This site puts forward the theory that Asian sea-farers were drawn to the Canada coast by the food rich kelp beds. It reports a 10,000 year old skeleton found in Alaskan cave had genetic traits identified in modern Japanese and Tibetans.

I read somewhere else that the native (indigenous) population of North America were mound builders ...... ??

I hadn't really given America a lot of thought in terms of archaeology except in relation to fire/smoke beacons - so the book in question has already proved useful.