Uintatherium: This beast was one of the many bizarre mammals roaming North America during the late Eocene epoch. This bulky, hoofed animal was larger than a modern rhinoceros and sported an array of short, knobby horns which grew upward from its nasal bones. In addition, a pair of daggerlike canine tusks jutted downward from its upper jaw.

Uintatherium was an ancient, distant cousin of horses, elephants and whales.

Name: Uintatherium
Length: 10-15 feet
Weight: 5,000-6,000 pounds
Time: Late Eocene
Place: Asia, North America
Diet: plant-eater (herbivore)