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Reindeer, or caribou as they’re known in North America, are impressive travellers. Herds made up of many thousands of animals can cover 5,000km each year in the far north of Europe, Siberia and Canada. This is one of the longest land migrations on Earth – but an ongoing transformation of the Arctic landscape threatens to break it up.
Roads, railways, mines, dams and tourist activities, such as snowmobile and husky trails, have disrupted the well-worn routes that reindeer follow each year, particularly across northern Europe. In one study, researchers found that reindeer in Norway lost 70% of undisturbed habitat during the 20th century. In Finland and Sweden, the figure is thought to be similar. ....

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