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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.
Footprint DNA helps scientists monitor elusive animals •
Polar bears can now be identified by DNA left in their paw prints - Weird News, Santa Fe, NM
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Polar Bear, Species