Wrangel Island (Ostrov Vrangelya, ˈostrəf ˈvrangjɪljə; Умӄиԓир) is an island of the Chukotka Autonomous Okrug, Russia. It is the 91st largest island in the world and roughly the size of Crete. Located in the Arctic Ocean between the Chukchi Sea and East Siberian Sea, the island lies astride the 180th meridian. The International Date Line is therefore displaced eastwards at this latitude to avoid the island as well as the Chukchi Peninsula on the Russian mainland, to keep the island on the same day as the rest of Russia. The closest land to Wrangel Island is the tiny and rocky Herald Island located to the east. Its straddling the 180th meridian makes its north shore at that point both the northeasternmost and northwesternmost point of land in the world by strict longitude; using the International Date Line instead those respective points become Herald Island and Alaska's Cape Lisburne.
Most of Wrangel Island and the nearby Herald Island is a federally protected nature sanctuary administered by Russia's Ministry of Natural Resources and Environment. The island, and its surrounding waters, were classified as a "Zapovednik" (a "strict nature reserve") in 1976 and, as such, receive the highest level of protection and exclude practically all human activity other than for scientific purposes. The Chukotka Regional government extended the marine protected area out to in 1999. As of 2003, there were four rangers who reside on the island year-round, while a core group of about 12 scientists conduct research during the summer months. Wrangel Island is the last known place where woolly mammoths survived, until around 4,000 years ago.
Captain Thomas Long named Wrangel Island for Baron Ferdinand von Wrangel, who was a Baltic German explorer and Admiral in the Imperial Russian Navy. Captain Long, published in The Honolulu Advertiser, November 1867:
I have named this northern land Wrangell Land as an appropriate tribute to the memory of a man who spent three consecutive years north of latitude 68°, and demonstrated the problem of this open polar sea forty-five years ago, although others of much later date have endeavored to claim the merit of this discovery.