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