Cathemeral

Decorator Crab

Wear the reef. Fool the predator.

Trapdoor spider

Hidden door, lightning strike.

Javan Leopard

Java's hidden rosettes in the mist

Limpet

Cling hard, graze smart, ride the tide.

Ostracod

Tiny shells, huge history

Knifefish

Life in South America, powered by volts

Kaluga Sturgeon

Giant hunter of the Amur

Dimetrodon

Permian sailback-before dinosaurs

Eryops

Permian powerhouse of the ponds

Deinocheirus

The terrible-handed wetland omnivore

Haikouichthys

A tiny fossil at vertebrates' dawn

Quetzalcoatlus northropi

Largest skies, long-necked hunter

Ornithocheirus

Bird-hand ruler of Cretaceous skies

Purussaurus

Miocene mega-caiman of South America

Allosaurus

Jurassic hunter of the Morrison

Lystrosaurus

The beaked survivor of Earth's worst crisis

Vegavis

A polar clue to waterfowl origins

Scutosaurus

Permian armor, plant-powered

Pachycephalosaurus

Built like a bipedal battering ram

Wiwaxia

Spiny armor from the Cambrian seafloor

Palaeoloxodon namadicus

The giant straight-tusked titan of Ice-Age India

Barylambda

Heavyweight of the Paleocene

Dunkleosteus

Armor-plated apex of Devonian seas

Helicoprion

Permian seas' spiral-toothed slicer