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