Quetzalcoatlus northropi
Largest skies, long-necked hunter
Reproductive Methods
Internal Fertilization
Sperm fertilizes egg inside the female's body, common in mammals, reptiles, and birds
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Animals
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Internal Fertilization Animals
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
Palaeoloxodon namadicus
The giant straight-tusked titan of Ice-Age India
Barylambda
Heavyweight of the Paleocene
Dunkleosteus
Armor-plated apex of Devonian seas
Hatzegopteryx
Hateg's giant sky-stalker
Helicoprion
Permian seas' spiral-toothed slicer
Teddy Guinea Pig
Plush coat, big squeaks, gentle charm.
Abyssinian Guinea Pig
Spikes, rosettes, and big personality
English Crested Guinea Pig
One crest. One color. Pure charm.
Peruvian Guinea Pig
The runway model of guinea pigs
Crayfish
Claws that shape freshwater worlds
Sequined Spider
Nature's tiny living disco ball
Khao Manee
Thailand's White Gem with jewel eyes
Yellow Crazy Ant
Small ant, supercolony impact
Nutria
Orange teeth, big impact on wetlands
Orinoco Crocodile
Orinoco's long-snouted river giant
Onager
Iran's lightning-footed onager