Argentinosaurus, discovered in Argentina, is one of the largest dinosaurs ever found. From nose to tail, it's more than 120 feet (37 meters) long, and some of its vertebrae are more than 5 feet (2 meters) wide. See a "birdlike reptile" next.
Image Credit: Photo courtesy Fernbank Museum of Natural History
Saurornithoides from the Late Cretaceous is an example of a birdlike dinosaur. Its inner toe had a sickle-shaped claw that may have been used as a weapon. See an unusual duckbilled dinosaur next.
Image Credit: Brian Franczak
Brachylophosaurus ("short-ridged reptile") was a hadrosaurid discovered in 1953. It had many functional and replacement teeth and a flaring, ducklike snout.
Image Credit: Brian Franczak
Massospondylus was a medium-size prosauropod from the Early Jurassic. The proportions of its skeleton suggest that it could rear up and possibly walk on its hind legs. Which dinosaur means "three-horned face"? Find out next.
Image Credit: Canadian Museum of Nature
Triceratops is one of the most spectacular and well known of all dinosaurs. This huge animal, with its long, pointed brow horns and curving neck frill, was one of the last dinosaurs to walk the Earth.
Image Credit: Chicago Academy of Sciences
Pachyrhinosaurus was probably the most unusual ceratopsid. It had a thick, bumpy, spongy pad of bone along the upper surface of its face. Check out a dinosaur egg fossil coming up next.
Image Credit: Brian Franczak
Wang Zhenghua (left), curator of a local museum, and Wang Fangchen, a scientist from Beijing, remove a fossilized dinosaur egg from a mountainside in Yunxian in central Hubei province.
Discover a fossilized embryo and skull next.
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Bones of the first known oviraptor embryo and the skull of a young dromaeosaur were found in the Gobi Desert.
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Prenocephale ("sloping head") had a large domed skull roof, which was probably used in head-butting contests. The thick skull roof would have protected the brain from damage during head-on collisions. Find the "ridged reptile" next.
Image Credit: Brian Franczak
These duckbilled dinosaurs, named Saurolophus, enjoy the shade and water on a warm Late Cretaceous day. Watch out for the ferocious Late Cretaceous carnivore on the next page.
Image Credit: Canadian Museum of Nature
With its massive head and large teeth, there is no question that Daspletosaurus ("frightful reptile") was master of its world. See a skeleton of a well-known dinosaur next.
Image Credit: Canadian Museum of Nature
The Stegosaurus ("covered reptile") weighed more than two tons, was a quadrupedal, was armored and had huge plates of bone arranged in rows along its back. See a "reptile from Edmonton" next.
Image Credit: National Park Service
The duckbilled dinosaur Edmontosaurus wades through a swamp searching for food. These dinosaurs had the most efficient jaws for chewing plants, and they became the most successful plant-eaters.
Image Credit: Canadian Museum of Nature
The Protoceratops ("first-horned face") was first discovered in 1922. It was also the first discovery of dinosaur eggs, and the discovery made news everywhere. Find a dinosaur that moved constantly, feeding day and night next.
Image Credit: American Museum of Natural History
The idea of a thundering walker gave Brontosaurus its name, which means "thunder lizard." The name Apatosaurus was used first for this dinosaur, so it is the correct name. See which dinosaur name means "meat bull" next.
Image Credit: Canadian Museum of Nature
The most exciting feature of the Carnotaurus ("meat bull") when it was found was its skin, because theropod skin impressions are rare finds. Visit with a dinosaur who was a hit in Hollywood next.
Image Credit: Brian Franczak
A 67-million-year-old Tyrannosaurus rex skeleton known as "Sue" stands on display. T-rex remains the largest known predator ever to have walked the earth and has more box-office clout than any creature in history. Check out an "ostrich dinosaur" next.
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Gallimimus ("chicken mimic") was the largest of the ornithomimids known. It had a small, ostrich-like head and could not use its hands to grasp, so it may have used them to dig in the ground for food. It is also possible it fed on eggs. Find the "slender conch-stealer" next.
Image Credit: Brian Franczak
Conchoraptors were smallish, bipedal animals with strong beaks that may have fed on mollusks by crushing their shells to get the soft meat inside. Find a Middle Jurassic dinosaur that lived in Asia next.
Image Credit: Brian Franczak
Huayangosaurus lived in a land of lakes, rivers, and lush vegetation in Asia. By looking at its teeth, scientists can tell it was a plant-eater. Its spiky, armor plates and shoulder spines could have protected it from predators.
Image Credit: Brian Franczak
The giant Apatosaurs had the advantage of height -- they used their long necks to graze at the tops of trees where other dinosaurs couldn’t reach. Click on to see which dinosaurs enjoyed a slightly lower view.
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The Mosasaur, a carnivorous sea-dweller and close relative of dinosaurs, had powerful jaws and teeth on the roof of its mouth. The next dinosaur was first known only by a handful of teeth.
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When Sir Richard Owen coined the term Dinosauria in 1841, he referred to only three animals, including the Iguanodon ("iguana tooth"), which was first known only from several teeth.
Image Credit: Ann Ronan Picture Library
Ouranosaurus had many features in common with Iguanodon, including its jaws filled with many teeth. See a chase scene next.
Image Credit: Brian Franczak
Camptosaurus had strong, agile rear legs that were made for running. It needed them to be able to escape from a creature like this Allosaurus, which could easily overpower even the largest Camptosaurus. See an Early Cretaceous armored dinosaur next.
Image Credit: Natural History Museum of Los Angeles County
The armor of Sauropelta ("lizard skin") formed in the skin, just like it does in modern alligators, crocodiles and certain lizards.
Image Credit: Canadian Museum of Nature
Another spiky herbivore, Kentrosaurus, was slightly smaller than Stegosaurus and had jaws that formed a sharp beak. Next, see a creature that was the smallest known dinosaur.
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Utahraptor, the largest of the Dromaeosaurs, had a long, hooked claw on each foot that it used for slashing into its prey. The next dinosaur had tiny arms and probably hunted in packs.
Want to put your newfound dinosaur knowledge to the test? Take our dinosaur quiz!
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