Photo: Indricotherium

Indricotherium is the largest land mammal ever discovered. A fully grown adult weighed up to 20 tons—the weight of three or four adult African elephants, which are the largest land mammals alive today. Indricotherium lived in the forests of central Asia between about 34 and 23 million years ago. Its closest living relative is the rhinoceros. This reconstruction is currently on display at the Denver Museum of Nature and Science.