"but the roasted ore sample was unique and, correct me if I am wrong, dateable. "

xlnt point Stanron. I thought so - and may have to go back and watch it again. One point made at the end seemed to be it could not be native Americans because the didn't do iron - which is well established and given it's age only the Vikings were in the frame.

I get the poit Dave O is making but Viking is a well established name for some of the people of Scandinavia who traveled large parts of Europe, the Med, Iceland and Greenland.

Best wishes