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Arctic hottest in 125 years: Polar bears rewrite DNA for survival

Arctic hottest in 125 years: Polar bears rewrite DNA for survival
The Arctic has hit its hottest point in more than a century, with record-low sea ice and melting glaciers. Scientists now say polar bears are activating hidden ‘jumping genes’ a last-ditch effort to survive in a warming world. Watch how evolution races against climate change.

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