Medieval Greenland

folks, Greenland is in the news for fairly stupid, very American reasons, so we decided to take a look back at Greenland during the Middle Ages. how did the Norse setup a colony on Greenland and keep it going in relatively European style for so long? what were their interactions like with the indigenous American groups? what were their lives like? and what happened to cause the end of the Greenlandic Norse settlements by about 1450?