Thule, named after Thule, Greenland, is the name given by archaeologists to the ancestors of the modern Inuit living across the Arctic from Bering Strait to Greenland. The Thule people entered northwest Canada about a thousand years ago, spreading quickly to Greenland in a century or so. On their way they subsisted on sea mammals and caribou, designing weapons (e.g. harpoons and arrows) and housing (e.g. snow igloos on the sea ice, half-buried stone or driftwood dwellings on the coast) as they adjusted to a variety of seasonal environments.