1200s: Icelanders record the first written sagas, Viking tales transmitted orally since the 800s
Early 1200s: Norsemen meet Dorset Paleoeskimos in northern Greenland
1250: Thule Eskimos, originally from Alaska, arrive in Canada/Greenland and displace the Dorset peoples
1260s: Climatic cooling and overgrazing disrupt Greenland's Norse livestock-based economy