Gray

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

Leedsichthys

Jurassic seas' gentle giant filter-feeder

Blue-Gray Gnatcatcher

Tail-flicking, gnat-grabbing dynamo

Gomphotherium

Four tusks, many worlds, one lineage

Canada Warbler

The necklace warbler of the boreal

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

Pelagornis

Giants of the wind-swept seas

Mosasaurus

Apex lizard of the Cretaceous seas

Hyaenodon

Hyena-toothed hunters of deep time

Brontosaurus

Thunder lizard, science icon

Tyrannosaurus Rex

Late Cretaceous king of crushing bites

Brachiosaurus

The high-shouldered sky-browsing sauropod

Pteranodon

Crested ruler of the Cretaceous skies

Ichthyosaurus

Fish-lizard, built for speed

Gargoyle Gecko

Horned head, forest-night hunter

Megalania

Pleistocene Australia's giant goanna

Livyatan

Big-toothed terror of the Miocene seas