Simple octopus Model: Octopus by YahooJAPAN, licensed under CC BY 3.0 .

Simple, ten-armed squid. Model: Cuttlefish by YahooJAPAN, licensed under CC BY 3.0 .

Ten-armed, large squid

Ten-armed, large squid

Eight-armed squid with a grim expression

Eight-armed squid with a grim expression

Eight-armed squid with a grim expression

Corpse of a fallen horse with saddle and bridle

Thick-skinned, prehistoric mammal that looks like a cross between a hippopotamus and a rhinoceros, lying dead on the ground with its stomach open

Standing Triceratops Model: Triceratops by YahooJAPAN, licensed under CC BY 3.0 .

Large four-legged dinosaur from the Jurassic with a neck shield and three horns

Large four-legged dinosaur from the Jurassic with a neck shield and three horns

Large four-legged dinosaur from the Jurassic with a neck shield and three horns

Large four-legged dinosaur from the Jurassic with a neck shield and three horns

Large four-legged dinosaur from the Jurassic with a neck shield and three horns

Large four-legged dinosaur from the Jurassic with a neck shield and three horns

Massive dinosaur carrying a wooden platform with a large portal on its back

Simple trilobite. Model: Trilobite by YahooJAPAN, licensed under CC BY 3.0 .

Large toucan with wings spread

Pterosaur with an impressive skull crest from the Lower Cretaceous

Pterosaur with an impressive skull crest from the Lower Cretaceous

Pterosaur with an impressive skull crest from the Lower Cretaceous

Pterosaur with an impressive skull crest from the Lower Cretaceous

Pterosaur with an impressive skull crest from the Lower Cretaceous