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To age a polar bear properly it's necessary to remove one of the vestigial pre-molars, a tooth just behind the lower canines. It's thought that these teeth are not used a great deal and are unnecessary for survival. Kaktovik, Alaska.

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Filename: D123530.jpg
Image Size: 700x468 / 104.5KB; www.naturalexposures.com; Alaska Arctic Beaufort Sea Horizontal Katovik PBI Polar Bear Research Ursus Maritimus Wildlife Research science scientific research
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To age a polar bear properly it's necessary to remove one of the vestigial pre-molars, a tooth just behind the lower canines. It's thought that these teeth are not used a great deal and are unnecessary for survival. Kaktovik, Alaska.