One of the theories about the demise of Viking settlers on Greenland was that the Norse were unable to adapt to the island's harsh climate, but Danish and Canadian researchers believe that was not the cause.
In a recent study, Jan Heinemeier of the Institute of Physics and Astronomy, Aarhus University found that the Viking diet consisted of a great deal of seafood, including seal. "Even though the Norse are traditionally thought of as farmers, they adapted quickly to the Arctic environment and the unique hunting opportunities. During the period they were in Greenland, the Norse ate gradually more seals. By the 14th century, seals made up between 50 and 80 per cent of their diet," he said.