Guardian: Link to this video Arctic explorers have taken the first-ever samples of ocean water at the north pole after a gruelling two-and–a-half month expedition across the polar ice. Headed by former bank manager Ann Daniels, the Catlin Arctic survey team achieved what last year’s expedition – led by polar explorer Pen Hadow – failed to do: reach the north pole and take water samples to measure the impact of a changing climate. Pen Hadow, the survey’s director and last year’s …