I cried, "Oh, Lady Midnight, I fear that you grow old, the stars eat your body and the wind makes you cold." "If we cry now," she said, "it will just be ignored."
I'm kinda thinkin that that skull is not a polar bear. I'm leaning a little in that direction. I'm not gonna guess outright, butI just looked at a bunch of them and all of them seem to match up pretty technically to the detail, whereas the one in Lost has a shorter front, and the teeth are different with a larger underbite. Looks like the jaw is set just a little differently. I'll have to guess that either it's not a polar bear, or they just made something close enough but didn't care to have something that matched in that much detail.