This story was originally published by the Guardian and is reproduced here as part of the Climate Desk collaboration. Changes in polar bear DNA that could help the animals adapt to warmer climates have been detected by researchers in a study thought to be the first time a statistically significant link has been found between rising temperatures and changing DNA in a wild mammal species. Climate breakdown is threatening the survival of polar bears. Two-thirds of them are expected to disappear by 2050 as their icy habitat melts and the weather becomes hotter. Now, scientists at the...

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