Polar bears can now be identified by DNA left in their paw prints

With grim predictions that all polar bears may be wiped out by the end of the century, it’s vital scientists find a way to better monitor the beasts to see if conservation efforts are having any impact. So they decided to 'fingerprint' them using DNA.

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Polar bears can now be identified by DNA left in their paw prints

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Paw-print DNA lets scientists track out-of-sight polar bears