- Megalodon: A giant prehistoric shark that lived about 23 million to 2.6 million years ago. Megalodons were some of the largest sharks that have ever lived, with some individuals estimated to have reached lengths of up to 59 feet.
- Mosasaur: A large prehistoric marine reptile that lived about 82 million to 66 million years ago. Mosasaurs were carnivores that fed on fish, other reptiles, and even small marine mammals. Some mosasaurs were over 40 feet long.
- Plesiosaur: A large prehistoric marine reptile that lived about 200 million to 66 million years ago. Plesiosaurs had long necks and small heads, and they used their flippers to swim. Some plesiosaurs were over 50 feet long.
- Tylosaurus: A large prehistoric marine reptile that lived about 94 million to 88 million years ago. Tylosaurus were mosasaur-like reptiles that could grow up to 45 feet long. They had long, sharp teeth and were fierce predators.
- Allosaurus: A large prehistoric carnivorous dinosaur that lived about 155 million to 145 million years ago. Allosaurus was one of the largest predators in its environment and could grow up to 39 feet long.
- Triceratops: A large prehistoric herbivorous dinosaur that lived about 68 million to 66 million years ago. Triceratops was one of the most common dinosaurs in North America during the late Cretaceous period. They could grow up to 30 feet long and weighed up to 12 tons.
- Tyrannosaurus rex: A large prehistoric carnivorous dinosaur that lived about 68 million to 66 million years ago. Tyrannosaurus rex was one of the most famous dinosaurs and was one of the largest carnivores that has ever lived. They could grow up to 40 feet long and weighed up to 15 tons.
- Woolly mammoth: A large prehistoric mammal that lived about 200,000 to 10,000 years ago. Woolly mammoths were covered in thick fur and had long, curved tusks. They could grow up to 13 feet tall and weighed up to 10 tons.
- Saber-toothed tiger: A large prehistoric mammal that lived about 2.5 million to 10,000 years ago. Saber-toothed tigers had long, sharp canine teeth that they used to kill their prey. They could grow up to 8 feet long and weighed up to 500 pounds.