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Published online 26 January 2006 | Nature | doi:10.1038/news060123-10
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Alaskan tundra thaws in warming world
Arctic puddles point to melting ice, but their effect is hard to predict.
Parts of Alaska that have been frozen for more than 3,000 years are now puddled with water, according to a team of scientists working in this northernmost US state.
Large parts of northern territories such as Alaska and Siberia contain permafrost: soil that stays frozen all year round.
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