1650 BC—The last Woolly mammoths become extinct on Wrangel Island.
Beyond the mainland, the district also incorporated the UNESCO World Heritage Site, Wrangel Island, which straddles the 180° meridian, and its neighboring island Herald, which in 2004 was added to the UNESCO World Heritage Site list at the same time as Wrangel Island.
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Linguist Michael E. Krauss has recently presented archaeological, historical, and linguistic evidence that Wrangel Island was a way station on a trade route linking the Inuit settlement at Point Hope, Alaska with the north Siberian coast, and that the coast may have been colonized in late prehistoric and early historic times by Inuit settlers from North America.
In 1922, the Canadian Prime Minister, William Lyon Mackenzie King officially announced the Canadian claim that Wrangel Island was British territory.