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"The upper ecosystem from the upper vegetation limit to the glacier is essentially the same over all climatic zones from the North Pole to the Antarctic, " says Mr Messerli.
UNESCO: 83e
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The altitude, low temperatures and lack of sunlight (at least during the Antarctic winter) make the atmosphere at the pole ideal for star-gazing.
ECONOMIST: Cosmology
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Scott had the misfortune to launch his final assault on the Pole at just when the Antarctic temperatures took an unlikely plunge.
FORBES: South to the Pole: Leadership Wins the Race
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The Twin Otter aircraft was flying from the South Pole to an Italian Antarctic base when its emergency beacon was activated at 10:00 GMT on Wednesday.
BBC: Antarctic search for missing plane carrying Canadians
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He was the first man to visit both the North and South Pole by land and the first to completely cross the Antarctic by foot.
CNN: Quest for exploration