Washington Post: Hubert Kokuluk squints with his one good eye to examine the tiny polar bear he has just carved from a fragment of walrus tusk. He isn’t happy with the yellowish hue, but good ivory is hard to come by these days, since quickly melting sea ice has made it extremely difficult for his Inupiaq Eskimo community to carry out the traditional annual spring walrus hunt. Though walruses are federally protected, Alaska Natives have subsistence rights to hunt them and rely on the meat, skin, …