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Elephant Foot Glacier in Greenland

Herbert Ponting

Brinicle by BBC: Brincles are underwater icicles which form in calm seas of polar regions when the air is much colder than the water. Warm ocean water freezes into very dense, salty ice plumes which sink to the ocean floor spreading and killing organisms it touches.

Air Force Colonel Joseph Kittinger, Jr. in a record-shattering free fall from the very edge of space on August 16, 1960, after jumping from a balloon-supported gondola 102,800 feet above New Mexico. During his descent, Kittinger reached approximate speeds of 614 miles an hour. The clouds beneath him are 15 miles away. Kittinger’s leap was part of the Air Force’s “Project Excelsior,” which conducted research into high altitude bailouts from aircraft. Incredibly, almost 50 years later, Kitti...

These are Frank Hurley’s famous early colour photographs of Sir Ernest Shackleton’s ill-fated ‘Endurance’ voyage, as part of the British Imperial Trans-Antarctic Expedition, 1914-1917. Hurley was the official photographer on the expedition. Early in 1915, their ship ‘Endurance’ became inexorably trapped in the Antarctic ice. Hurley managed to salvage the photographic plates by diving into mushy ice-water inside the sinking ship in October 1915. - State Library of New South Wales

Mt. Erebus and a Dome Cloud, Scott Expedition, Antarctica by Herbert George Ponting, 1911