Sumatran Rhino Ancestors: The Woolly Rhino
Oddly enough, the Sumatran rhinos of southeast Asia – the smallest and most endangered rhinos in the world – are more closely related to the extinct woolly rhino than they are to any of the four other living rhino species. The woolly rhino, an Ice Age creature, became extinct several thousand years ago. Its images can be found on cave walls and its mummified remains buried deep in the Arctic tundra. While the two horns of the Sumatran rhino are very small and blunt, those of the woolly rhino were long with prominent edges.