mikroman6/Moment/Getty Images
Vikings were skilled seafarers who traded with other civilizations in Europe and the Middle East.
The Museum of Southwest Jutland
Writing in the journal Nature on December 22, researchers laid out the timeline leading up to the Viking Age.
Researchers can use tree rings dating back to the days of Vikings as a benchmark to determine the age of artifacts from the era.
DEA / C. SAPPA/De Agostini/Getty Images
The method has also used to pinpoint the exact age of the Vikings’ only settlement in North America, L’Anse aux Meadows.