Troodon Dinosaurs

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

Ornithomimus Dinosaurs

Ornithomimus likely had a relatively long lifespan for a dinosaur, potentially reaching up to 50 years old. elaborate

Carnotaurus Dinosaurs

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

Compsognathus Dinosaurs

Compsognathus is one of the smallest known dinosaurs, about the size of a chicken. elaborate

Therizinosaurus Dinosaurs

Therizinosaurus's claws were so long, some were nearly three feet (a meter) in length—longer than a human arm! elaborate

Velociraptor Dinosaurs

Velociraptors were only about the size of a large chicken. elaborate

Cryolophosaurus Dinosaurs

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

Deinonychus Dinosaurs

Deinonychus's name means "terrible claw," referring to its large, sickle-shaped claw on each foot. elaborate

Microraptor Dinosaurs

Microraptor, a four-winged dinosaur, likely had asymmetrical feathers, suggesting it was capable of controlled flight. elaborate

Utahraptor Dinosaurs

Utahraptor's sickle claw on each foot could grow up to a foot long! elaborate

Coelophysis Dinosaurs

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

Albertosaurus Dinosaurs

Albertosaurus fossils show evidence of injuries, including a healed bite wound on one specimen's jaw, suggesting they fought each other, possibly over territory or mates. elaborate

Giganotosaurus Dinosaurs

Giganotosaurus was bigger than Tyrannosaurus Rex. elaborate

Ceratosaurus Dinosaurs

Ceratosaurus had a horn on its nose, and two smaller horns above its eyes, but its most distinctive feature was a prominent bony frill or crest along its neck and back. elaborate

Theropods Dinosaurs

Some theropods, like *Carnotaurus*, had horns on their heads, not just for display but possibly for intraspecies combat. elaborate

Spinosaurus Dinosaurs

Spinosaurus had a sail on its back, possibly used for display, thermoregulation, or both. elaborate

Tyrannosaurus rex Dinosaurs

T. Rex arms were so short, they couldn't even reach its mouth. elaborate

Baryonyx Dinosaurs

Baryonyx's most distinctive feature, its massive thumb claw, was likely used for catching and subduing fish. elaborate

Daspletosaurus Dinosaurs

Daspletosaurus had a bony crest above its eyes, which likely played a role in species recognition or intraspecific combat. elaborate

Allosaurus Dinosaurs

Allosaurus had a unique, S-shaped neck, unlike the straighter necks of many other large theropods. elaborate

Gallimimus Dinosaurs

Gallimimus, despite its bird-like appearance, likely couldn't fly. elaborate

Megaraptor Dinosaurs

Megaraptor's "raptor" claws weren't actually on its feet like other raptors; its largest claw was on its hand. elaborate

Dilophosaurus Dinosaurs

Dilophosaurus, contrary to its portrayal in *Jurassic Park*, had no neck frill or venom-spitting ability. elaborate

Tarbosaurus Dinosaurs

Tarbosaurus bataar, despite its name and appearance, wasn't actually a Tyrannosaurus. It was a close relative, but belonged to a different genus. elaborate

Acrocanthosaurus Dinosaurs

Acrocanthosaurus had spines along its back that were much taller than those of most other theropods, possibly supporting a hump or sail. elaborate