Beaufort Sea Polar Bear Research- Photography by Daniel J. Cox
Filename: danieljcoxD123654
Caption: Geoff York, a USGS biologist, prepares a male polar bear (Ursus maritimus) to extract a tooth for aging the animal. 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.