South Pole
In midsummer, as the sun reaches its maximum elevation of about 23.5 degrees, high temperatures at the South Pole in January average at . As the six-month "day" wears on and the sun gets lower, temperatures drop as well: they reach around sunset (late March) and sunrise (late September). In midwinter, the average temperature remains steady at around . The highest temperature ever recorded at the Amundsen–Scott South Pole Station was on Christmas Day, 2011, and the lowest was on June 23, 1982 (for comparison, the lowest temperature directly recorded anywhere on earth was at Vostok Station on July 21, 1983, though was measured indirectly by satellite in East Antarctica between Dome A and Dome F in August 2010). Mean annual temperature at the South Pole is -49.3 °C (-56.7 °F).
Eric Larsen (explorer)
In March 2014, Eric Larsen and Ryan Waters set out to traverse nearly 500 miles across the melting Arctic Ocean, unsupported, from Northern Ellesmere Island to the geographic North Pole. Despite being one of the most cold and hostile environments on the planet, the Arctic Ocean has seen a steady and significant reduction of sea ice over the past seven years due to climate change. Because of this, Larsen’s and Waters’ trip—dubbed the “Last North Expedition”—is expected to be the last human-powered trek to the North Pole, ever.