The Norse had settled Greenland for hundreds of years. The first Norse colony in Greenland was founded by Erik the Red in 986 AD, and settlements survived there until the 15th century, when they vanished. The settlements likely died off from a combination of starvation (due to the Little Ice Age), plague, and violent conflicts with the Thule Inuits who replaced the native Dorset natives of Greenland by 1300.
As many know, in the year 1000, Erik the Red's son Leif Erikson discovered Vinland (New England/Nove Scotia) and Markland (Labrador/Quebec), and made a brief settlement there which seemed to not have lasted very long.
Now, the Greenlanders who continued to live in Greenland for centuries, and the Icelanders who survived to the day, knew that these lands existed. There is evidence that the Norwegians, Danes, Swedes, and even possibly Scottish and English sailors knew these lands existed to the very time of Columbus.
So, if the Greenlanders knew this land existed, and were dealing with population struggles, why did they not sail southwest to the Americas? Is it possible or probable that they could have made a second Vinland colonization effort?
The main problem with this is that they would probably (and if conventional history is to be trusted, they did) go to Iceland. What could cause them to be deterred from Iceland? Overpopulation in Iceland perhaps?
What would happen if Greenlanders did relocate to Vinland completely?