DerivationThere are two main groups referred to as Eskimo: Yupik and Inuit. A third group, the Aleut, is related. The Yupik language dialects and cultures in Alaska and eastern Siberia have evolved in place beginning with the original (pre-Dorset) Eskimo culture that developed in Alaska. Approximately 4,000 years ago the Unangam (also known as Aleut) culture became distinctly separate, and evolved into a non-Eskimo culture. Approximately 1,500-2,000 years ago, apparently in Northwestern Alaska, two other distinct variations appeared. The Inuit language branch became distinct and in only several hundred years spread across northern Alaska, Canada and into Greenland. At about the same time, the Thule Technology also developed in northwestern Alaska and very quickly spread over the entire area occupied by Eskimo people, though it was not necessarily adopted by all of them.
The earliest known Eskimo cultures were Pre-Dorset Technology, which appear to have been a fully developed Eskimo culture that dates to 5,000 years ago. They appear to have evolved in Alaska from people using the Archaic Small Tools Technology, who probably had migrated to Alaska from Siberia at least 2 to 3 thousand years earlier; though they might have been in Alaska as far back as 10 to 12 thousand years or more. There are similar artifacts found in Siberia going back to perhaps 18,000 years ago. It is believed that the Mongols, Eskimos, and probably the Korean people too all share a common ancestor in northern Asia.
Today the two main groups of Eskimos are the Inuit of northern Alaska, Canada and Greenland, and the Yupik, comprising speakers of four distinct Yupik languages and originating in western Alaska, in South Central Alaska along the Gulf of Alaska coast, and in the Russian Far East.
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