Tooth marks link Vikings, Indians
A scientist who found deep grooves chiselled into the teeth of dozens of 1,000-year-old Viking skeletons unearthed in Sweden believes the strange custom might have been learned from aboriginal tribes during ancient Norse voyages to North America -- a finding that would represent an unprecedented case of transatlantic, cross-cultural exchange during the age of Leif Ericsson.
The marks are believed to be decorations meant to enhance a man's appearance, or badges of honour for a group of great warriors or successful tradesmen. They are the first historical examples of ceremonial dental modification ever found in Europe, and although similar customs were practised in Asia and Africa over the centuries, the Swedish anthropologist who studied the Viking teeth is exploring the possibility that trips to Newfoundland and other parts of the New World a millennium ago introduced the Norsemen to tooth-carving styles being carried out at that time in the Americas.
Interesting, but the American origina of the marks seems to have been overplayed. The paper in question (link might not work) doesn't make a whole lot of this possible connection, mostly just stating that the marks are similar to some found in the New World from about the same time. However, the examples given in the paper are from Illinois, Arizona, and Georgia; all very far from the only place we know Scandinavians made landfall in the New World. Mostly it makes for an interesting parallel.