The map, supposedly dating back to the 15th century, was a big deal because it added weight to the claim that Vikings landed in North America before Christopher Columbus.

The Vinland Map, which supposedly showed the exploration of North America by Vikings in the 15th century, is fake, according to researchers at Yale. The map was first discovered in 1965, but ...

To create the map, the researchers amassed over 2,000 stress orientations taken across North America, of which 300 are brand new. These measurements were taken from boreholes—long, narrow shafts ...

In the long term, the map could inspire and inform modeling efforts aimed at better understanding North America's geologic past, as well as the continent's present day tectonic intricacies.