Roald Engelbregt Gravning Amundsen (16 July 1872 – c. 18 June 1928) was a Norwegian explorer of polar regions. He led the Antarctic expedition of 1910–12 which was the first to reach the South Pole, on 14 December 1911. In 1926, he was the first expedition leader for the air expedition to the North Pole. Amundsen is recognized as the first person, without dispute, as having reached both poles. He is also known as having the first expedition to traverse the Northwest Passage (1903–06) in the Arctic.