Titanoboa
- When: Paleocene
(60–58 mya) - Where: South America
- What: Snake
- Weight: 1.1 metric tons
- Length: 13 meters
- Diet: Carnivorous
- Discovered: 2009
Paleocene
Uintatherium
- When: Paleocene to Eocene
(56–37 mya) - Where: North America
- What: Mammal
- Weight: 2 metric tons
- Length: 4 meters
- Diet: Herbivorous
- Discovered: 1872