Discovery Channel

When Giants Roamed the Earth: Dynamic Dinosaur Pictures

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The spiny-headed dinosaur Stygimoloch is the latest pachycephalosaur to have ... — The spiny-headed dinosaur Stygimoloch is the latest pachycephalosaur to have been discovered. Its name means "River of Hades devil," and it was found in the United States in Montana and Wyoming. Next up: another Western American dinosaur.

Measuring about 30 feet (9 meters) long, the Late Cretaceous ... — Measuring about 30 feet (9 meters) long, the Late Cretaceous tyrannosaur Daspletosaurus was a fearsome predator with a name meaning "frightful reptile." This dinosaur was very similar in structure to the next one, which is much more well-known.

As tall as a house, the carnivorous Tyrannosaurus used its ... — As tall as a house, the carnivorous Tyrannosaurus used its powerful legs and teeth to overpower prey. Next, see some peaceful plant-eaters.

The giant Apatosaurs had the advantage of height -- they ... — 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.

Discovered mostly in Canada and Mongolia, the duckbilled dinosaur Saurolophus ... — Discovered mostly in Canada and Mongolia, the duckbilled dinosaur Saurolophus had a uniquely shaped face, with a shallow hole extending from the top of the bony crest to the nostrils. Saurolophus may have used this hole to inflate a flap of skin with air to make noises. Next, see a dino that walked on all fours.

Contrary to popular belief, dinosaurs like Diplodocus probably didn't spend ... — Contrary to popular belief, dinosaurs like Diplodocus probably didn't spend all their time in water. These dinosaurs, which were the world's longest, ate soft plants and walked with their tails off the ground to help them balance. The next dinosaur lived underwater.

The water-loving Elasmosaurus had four large flippers and more than ... — The water-loving Elasmosaurus had four large flippers and more than 70 vertebrae in its neck. Next, see which water-dweller is sometimes called the T-Rex of the sea.

The Mosasaur, a carnivorous sea-dweller and close dino relative, had ... — The Mosasaur, a carnivorous sea-dweller and close dino relative, had powerful jaws and teeth on the roof of its mouth. The next dangerous dinosaur’s name means “other reptile.”

In the late Jurassic period, the carnivorous Allosaurus was a ... — In the late Jurassic period, the carnivorous Allosaurus was a major predator of giant sauropods like Apatosaurus, despite being smaller. The next carnivore’s skeleton was discovered in Utah in 1991.

Utahraptor, the largest of the Dromaeosaurs, had a long, hooked ... — 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.

A fairly new discovery, Aucasaurus was a Cretaceous carnivore that ... — A fairly new discovery, Aucasaurus was a Cretaceous carnivore that probably weighed in at about 1,500 pounds (680 kilograms). Which dino’s name means “covered reptile?” Click on to find out.

With huge plates of bone lining its back and pointed ... — With huge plates of bone lining its back and pointed spines on its tail, Stegosaurus was definitely one of the more unique-looking dinosaurs of the Late Jurassic period. See a close relative of Stegosaurus on the next page.

Another spiky herbivore, Kentrosaurus was slightly smaller than Stegosaurus and ... — Another spiky herbivore, Kentrosaurus was slightly smaller than Stegosaurus and had jaws that formed a sharp beak. Next, see another popular dinosaur that was one of the last on Earth.

Known for its spectacular curved neck frill and long, pointed ... — Known for its spectacular curved neck frill and long, pointed horns, Triceratops lived in North America and was one of the last dinosaurs to appear before the mass extinction. See a similar dino on the next page.

Another ceratopsid, Styracosaurus was unique because of the long, pointed ... — Another ceratopsid, Styracosaurus was unique because of the long, pointed spikes along its neck frill and the long, straight horn on its nose. Check out the next page for another frilled dinosaur.

More primitive than the ceratopsids, Proceratops belonged to an earlier ... — More primitive than the ceratopsids, Proceratops belonged to an earlier genus and lacked well-developed horns. Which dinosaur enjoyed a diet of coarse leaves? Click to next page to find out.

Probably the most common of the Late Jurassic sauropods, Camarasaurus ... — Probably the most common of the Late Jurassic sauropods, Camarasaurus had unusually large, pointed teeth, most likely used for eating coarse foliage. Next, see a reptile that took to the sky.

Pterodon, while not technically a dinosaur, was the largest of ... — Pterodon, while not technically a dinosaur, was the largest of the flying reptiles that shared their space, with a wingspan of up to 30 feet (9 meters). Click to the next page to see a rival of Allosaurus.

With a high running speed and the ability to take ... — With a high running speed and the ability to take down prey with a single blow, Ceratosaurus was a fearsome predator. Click on to see which sauropod was thought to have the longest body.

Although it reached a length of around 90 feet (27 ... — Although it reached a length of around 90 feet (27 meters), Diplodocus was built much more lightly than its sauropod relatives, like Apatosaurus. The next giant’s name means “titanic lizard.”

Titanosaurus, one of the last sauropods to walk the Earth, ... — Titanosaurus, one of the last sauropods to walk the Earth, is still a bit of mystery -- while incomplete skeletons have been discovered, scientists have yet to unearth a Titanosaurus skull. Click on to see the tiniest of the carnivorous dinos.

About the size of a turkey, carnivorous Compsognathus was the ... — About the size of a turkey, carnivorous Compsognathus was the smallest known dinosaur and chased down its prey on two back legs. What does a dino skull look like? Check out the next picture to see.

The Tyrannosaurus was the largest known predator to have walked ... — The Tyrannosaurus was the largest known predator to have walked the Earth and boasted a mouth that contained up to 60 teeth. Click on to see where you can examine more dinosaur bones.

The Dinosaur Hall at the National Museum of Natural History ... — The Dinosaur Hall at the National Museum of Natural History houses a wide variety of dinosaur skeletons, from fearsome carnivores to massive herbivores. Next up, check out a partially excavated dino skull.

This Camarasaurus skull is being excavated at Dinosaur National Monument ... — This Camarasaurus skull is being excavated at Dinosaur National Monument in Utah. This dinosaur had quite a unique head, complete with extra-large jaw bones and enormous teeth. Because its teeth were sharp, the plant-eating Camarasaurus probably dined on tough, coarse foliage. The next specimen has held its shape for millions of years.

Fossilized dinosaur eggs are fairly rare, but they've been found ... — Fossilized dinosaur eggs are fairly rare, but they've been found at locations around the world. They help teach researchers about nest size and structure, as well as how hatchlings of various species may have behaved when they were first born. The next fossil taught scientists a lot about the link between birds and dinosaurs.

Archaeopteryx is the world's oldest bird. Because fossils of the ... — Archaeopteryx is the world's oldest bird. Because fossils of the creature were found in limestone quarries, they were very well preserved, even including fossilized feathers. Archaeopteryx was smaller than most people realize, with a wingspan of only about 2 feet (60 centimeters). Check out another bird on the next page.

While scientists do generally agree that there's a link between ... — While scientists do generally agree that there's a link between birds and dinosaurs, there's an ongoing debate about what exactly that link is. Did they share a common ancestor, or did one evolve from the other? There's no definitive answer. Next, Bigfoot might not be real, but whatever left this behind certainly was.

Fossilized dinosaur footprints can be a great source of information ... — Fossilized dinosaur footprints can be a great source of information for paleontologists, teaching them about how dinosaurs walked, the speed at which they moved and how their social patterns worked. This fossilized track of a lower Jurassic theropod was found on a Navajo reservation in Arizona. Check out one more dino skeleton on the next page.

Leonardo, the 77-million-year-old Brachylophosaurus, was found in a Montana canyon ... — Leonardo, the 77-million-year-old Brachylophosaurus, was found in a Montana canyon in 2000. Although other fossils of this species have been found, Leonardo is extra special because he still has skin. Basically, this means that his internal organs have also been preserved, and researchers are doing their best to study Leo without destroying the fossil. Still hungry for more dino knowledge? Check out our list of 10 greatest dinosaurs of all time.

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