просвещайся, тундра! http://ru.wikipedia.org/wiki/%D0%9C%D0%B0%D1%80%D0%BA_%D0%90%D0%BD%D1%82%D0%BE%D0%BD%D0%B8%D0%B9_%D0%9E%D1%80%D0%B0%D1%82%D0%BE%D1%80