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Two islands in the Bering Strait. Lying about 2.5 mi (4 km) apart, they are separated by the U.S.-Russian boundary, which coincides with the International Date Line. The larger island, Big Diomede (Russian Ratmanov), belongs to Russia and is the site of an important weather station. To the east lies Little Diomede Island, a part of Alaska.
This entry comes from Encyclopædia Britannica Concise. For the full entry on Diomede Islands, visit Britannica.com.