The muskox (Ovibos Moschatus) is a massive arctic animal. It weighs up to 400 kg (880 pounds) and measures up to 2.5 meters long (over 8 feet). Although it lived across Europe during the last ice age, it went extinct on the Eurasian continent around the same time that the last wooly mammoth vanished about 3000 to 4000 years ago.