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ÿþBBC Learning English Words in the News 28th January 2011 Scientists track polar bear s nine-day swim Scientists working in the Arctic have tracked a polar bear that swam non-stop for nine days. A team, from the US Geological Survey, followed the bear in 2008, as it left Alaska and swam north to the sea ice. They published details of the remarkable feat in the journal  Polar Biology . Victoria Gill, reports. Polar bears are superb swimmers. But their hunting ground is the surface of the Arctic ice, where resting seals make easy and calorie-rich prey. In the summer though, a swim between ice floes to catch seals can turn into a marathon. The researchers fitted the female bear with a radio collar, and tracked her as she swam continuously for nine days - the longest polar bear swim ever recorded. She covered almost 700 km in waters as cold as 2C. Then she hauled herself out of the water and travelled a further 1,800 km - intermittently swimming and walking on the surface of the ice. When the team recaptured the bear, she had lost almost a quarter of her body weight and her year-old cub, which had been travelling alongside her, had disappeared. The scientists say that the retreating Arctic ice could be forcing polar bears to take greater risks in search of food, embarking on ever more perilous long-distance journeys. Victoria Gill, BBC News Words in the News © British Broadcasting Corporation 2011 Page 1 of 2 bbclearningenglish.com Vocabulary and definitions superb very good indeed calorie-rich full of calories, which provide energy prey animal which is being hunted by people or another animal ice floes large areas of ice which float on the sea hauled pulled or carried with great effort intermittently sometimes or occasionally cub here, young polar bear retreating here, melting ice embarking starting, beginning, or setting off perilous very dangerous More on this story: http://news.bbc.co.uk/earth/hi/earth_news/newsid_9369000/9369317.stm Read and listen to the story and the vocabulary online: http://www.bbc.co.uk/worldservice/learningenglish/language/wordsinthenews/2011/01/110128_polar_swim_page.shtml Words in the News © British Broadcasting Corporation 2011 Page 2 of 2 bbclearningenglish.com

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