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Published online 7 September 2004 | Nature | doi:10.1038/news040906-8
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North Pole once enjoyed Mediterranean climate
Arctic ocean drilling reveals bygone greenhouse world.
The Arctic Ocean used to be so warm it was practically Mediterranean, an international drilling team has found. Although the Earth was known to have warmed rapidly 55 million years ago, no one had expected to find evidence of such high temperatures so close to the North Pole.
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