![Ivory Trade in Medieval Europe Spurred Rise and Fall of Viking Colonies in Greenland, Walrus DNA Study Finds](https://i0.wp.com/archaeologyinbulgaria.com/wp-content/uploads/2018/08/Walrus-ivory-tusks-skull.jpg?resize=150%2C150&ssl=1)
Ivory Trade in Medieval Europe Spurred Rise and Fall of Viking Colonies in Greenland, Walrus DNA Study Finds
The Norse, or Viking colonies in Greenland had a near monopoly on medieval Western Europe’s trade in ivory but precisely overreliance on it may have led to their mysterious vanishing, an analysis of walrus DNA suggests.