Largest thunder beast

Also known as brontotheres or titanotheres, thunder beasts were enormous prehistoric odd-toed ungulates resembling rhinoceroses but more closely related to horses. The largest thunder beast was Brontotherium, which lived in North America during the late Eocene Epoch (55.8-33.9 million years ago). Characterised by a very large Y-shaped, horn-like structure of bone on its nose, this mighty browsing mammal stood approximately 2.5 m (8.2 ft) high at the shoulder, and may have weighed up to 1,000 kg (2,204 lb). When native American Indians first found the huge fossilised bones of this creature, they mistakenly thought that they were from a legendary beast called the thunder horse that supposedly leaped down from the sky to earth during thunderstorms. Recalling this folklore, scientists chose to call this prehistoric mammal Brontotherium - 'thunder beast'.