What is the X in X-mas?
strait linking the Arctic Ocean with the Bering Sea and separating the continents of Asia and North America at their closest point. The strait averages 98 to 164 ft (30 to 50 m) in depth and at its narrowest is about 53 mi (85 km) wide. There are numerous islands in the strait, including the two Diomede Islands (about 6 sq mi [16 sq km]), and to the south of the strait lies St. Lawrence Island (about 1,000 sq mi). The U.S.-Russian boundary extends through the strait.