Adult male polar bear walking over the tundra ANWR, Alaska.

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A large male adult polar bear (Ursus maritimus) wearily walks across the frozen, snow-covered tundra of the Arctic National Wildlife...
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A large male adult polar bear (Ursus maritimus) wearily walks across the frozen, snow-covered tundra of the Arctic National Wildlife Refuge, in Alaska. Photo © copyright by Carl Donohue.

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