Ross Island

Either of two islands in Antarctica:

Ross Island in the Weddell Sea, discovered in 1903 by the Swedish explorer Nils Nordenskjöld, area about 3,885 sq km/1,500 sq mi;

Ross Island in the Ross Sea, discovered in 1841 by the British explorer James Ross, area about 6,475 sq km/2,500 sq mi, with the research stations Scott Base (New Zealand) and McMurdo (USA). Mount Erebus (3,794 m/12,520 ft) is the world's southernmost active volcano; its lake of molten lava may provide a window on the magma beneath the Earth's crust that fuels volcanoes.