Roald Engelbregt Gravning Amundsen (16 July 1872 – c. 18 June 1928) was a Norwegian explorer of polar regions. He led the first Antarctic expedition to reach the South Pole between 1910 and 1912. He was also the first person to reach both the North and South Poles.He is known as the first to traverse the Northwest Passage. He disappeared in June 1928 while taking part in a rescue mission. Amundsen with Douglas Mawson, Robert Falcon Scott, and Ernest Shackleton, was a key expedition leader during the Heroic Age of Antarctic Exploration.