from the video:
"Published on Dec 5, 2012
The west coast of Greenland was the site of a thriving Viking colony for hundreds of years. Originally settled by explorers who had bravely sailed across the treacherous North Atlantic from their homes in Scandinavia, the Greenland outpost grew into a farming community of thousands. And then something went terribly wrong. Visitors in the 1400s reported that the inhabitants had simply vanished, leaving. "
Of all the Viking settlements, only two failed: North America (after just a few years) and Greenland (but only after 500 years)
This video is about what might have taken place. In fact what led to the demise of the Viking settlers, was GLOBAL COOLING