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An Allosaurus emerges from the forest and targets a Stegosaurus, which is approaching a stream. In the background, a Brachiosaurus, and in the dawn sky, pterosaurs.

Species Profiles

Gasosaurus

The Anatomy of an Ambush The skeleton of Gasosaurus points to a hunter built for explosive speed…
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Ornithomimus

The Cretaceous dragster: legs and locomotion The Ornithomimus was engineered to vanish. The hind…
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Spinosaurus

This animal stands as perhaps the most extraordinary carnivorous dinosaur ever discovered, sparking…
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Tyrannosaurus rex

The anatomy of the Tyrannosaurus describes a biological machine calibrated for lethal trauma. A…
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Velociraptor

The anatomy of Velociraptor outlines a predator with a skeletal framework and plumage entirely…
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Diplodocus

The Living Bridge: Body, Neck, and Defenses Picture Diplodocus as a gigantic, biological…
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Brachiosaurus

The Living Tower: Posture and Limbs The anatomy of Brachiosaurus was a masterpiece of…
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Aardonyx

A Skeletal Excavator Bucket The skull of Aardonyx functioned like the bucket of a mechanical…
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A small herd of brontosauruses crosses the floodplain

Brontosaurus

Evolution sculpted this imposing sauropod with one primary goal: supporting a titanic mass. …
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Ankylosaurus magniventris

The Living Tank: Build and Posture The anatomy of Ankylosaurus functioned as a mobile fortress,…
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4 Stegosauruses heat near river

Stegosaurus

The anatomy of the Stegosaurus is defined by a stark disproportion between its massive, tank-like…
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Torosaurus

The Pierced Shield (Skull and Frill) The anatomy of Torosaurus is defined by a cranial scaffolding…
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