7 Giant Animals That Are Now Extinct Part 1

5. Paraceratherium

The Largest Land Mammal Ever

Paraceratherium holds the record as the largest land mammal ever known.

Key facts:

• Weighed up to 20 tons
• About 26 feet long
• Hornless relative of modern rhinos
• Herbivore

Fossils were first found in Pakistan, which is why it’s sometimes called Baluchitherium. Environmental changes and competition for food likely caused its extinction around 23 million years ago.