Carnotaurus

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Dinosaurs

Carnotaurus is one of the few known theropod dinosaurs with horns on its head. elaborate share

Iguanodon

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Dinosaurs

Iguanodon's thumb spike was likely used for defense, not for digging as initially thought. elaborate share

Pachycephalosaurus

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Dinosaurs

Pachycephalosaurus's skull was up to 10 inches thick, but scientists still debate exactly how it was used – whether for head-butting, or perhaps more for flank-butting or display. elaborate share

Coelophysis

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Dinosaurs

Coelophysis, a dinosaur from the Triassic period, had surprisingly hollow bones, making it lightweight and agile. elaborate share

Troodon

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Dinosaurs

Troodontids likely had the largest brain-to-body size ratio of any known non-avian dinosaur. elaborate share

Cryolophosaurus

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Dinosaurs

Cryolophosaurus's head crest wasn't upright like other dinosaurs with crests; it was more of a flat, forward-curving "Elvis" style. elaborate share