Keywords: "ice age", Bovidae, Caprinae, Europe, Greenland, Muskoxen, Norway, Ovibos moschatus, Pleistocene, Scandinavia, arctic, bull, bulls, calf, calves, cow, cows, hair, hairs, herd, horn, horns, illustration, illustrations, image, images, introduced, introduction, juvenile, juveniles, male, males, mammal, mammals, mountains, musk ox, musk oxen, musk-ox, musk-oxen, muskox, photo, photos, portrait, ram, relic, sky, snow, spar, sparring, white, wildlife, wildlife, wind, windy, winter