Cathemeral

Spinosaurus

Sail-backed hunter of ancient rivers

Compsognathus

Small body, sharp bite, Jurassic sprint

Ceratosaurus

The horned hunter of the Morrison

Tarbosaurus

Nemegt's tyrant king

Basilosaurus

The long-bodied king of Eocene seas

Tylosaurus

Ram-snouted ruler of Cretaceous seas

Dickinsonia

Quilted giant of Earth's deep past

Plesiosaur

Four flippers, many lifestyles

Megatherium

The Great Beast of the Ice Age

Tully Monster

Illinois' Carboniferous mystery creature

Leedsichthys

Jurassic seas' gentle giant filter-feeder

Suchomimus

Croc-snouted hunter of Cretaceous Niger

Cave Bear

The Pleistocene cave hibernator

Cave Lion

Ice Age king of the open steppe

Patagotitan

Patagonia's colossal long-neck

Psittacosaurus

Small beak, big Cretaceous success

Gomphotherium

Four tusks, many worlds, one lineage

Platybelodon

The Miocene Shovel-Tusker

Daeodon

Not a pig-just terrifying teeth.

Troodon

Famous, brainy, and taxonomically tricky

Amargasaurus

Two spines, one Patagonian icon

Elasmotherium

The steppe rhino behind unicorn lore

Microraptor

Four wings, one big flight story

Mosasaurus

Apex lizard of the Cretaceous seas