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    The well-known sauropod (long-necked plant-eating dinosaur) Diplodocus is one of the longest land animals that ever existed. It had a long, slender neck, a bulky body, and an extremely lengthy, whip-like tail. Its low, horse-like head, very small for such a gigantic dinosaur, held a tiny brain. The pencil-shaped teeth of Diplodocus were held only in the tips of its jaws, and may have been used for stripping vegetation from stems or branches.

    Camarasaurus is very well known from fossils found in the western United States, in a set of rocks called the Morrison Formation. This Late Jurassic sauropod, or long-necked plant-eating dinosaur, had a comparatively large head and sturdy jaws lined with strong, spoon-shaped teeth. It walked with its back and tail held horizontally, and was probably able to raise its head and neck high above its shoulders.

    Beipiaosaurus is one of the earliest and most primitive known therizinosaurs – a bizarre group of plant-eating dinosaurs that evolved from meat-eating ancestors about halfway through the Age of Dinosaurs. The jaws of B. held many tiny, leaf-shaped teeth, and were tipped by a toothless beak. The long claws on its hands were probably used for defense from predators, and its body was covered in feather-like filaments. www.naturalhistor... Image © Carnegie Museum of Natural History

    Kronosaurus was a huge, powerful meat-eater that lived in the shallow seas that flooded parts of what is now Australia during the Cretaceous Period. It is not a dinosaur, but instead is one of the most massive known plesiosaurs – a group of seagoing reptiles that includes both long- and short-necked species. The immense head of Kronosaurus was over eight feet (2.4 meters) long, about one-quarter of the creature’s total length.

    This long-necked plant-eating dinosaur lived during the Jurassic Period, in western North America.

    Large bony plates and smaller studs in the skin of the back and sides characterize the unusual body of Saltasaurus. The “armor” of this elephant-sized sauropod, or long-necked plant-eating dinosaur, probably served for defense against attacks by large predators. Saltasaurus had a thick tail supported by interlocking vertebrae, possibly providing support for the animal as it reared up to feed on tall plants.

    Scientists have estimated that Apatosaurus weighed five times as much as an average bull elephant. Imagine how the ground must have shaken when this giant walked by! The long neck of Apatosaurus may have allowed this dinosaur to browse both in tall trees and on low-growing vegetation. To fuel its body, it needed to eat great quantities of plants every day. Apatosaurus is sometimes incorrectly called Brontosaurus. www.naturalhistor... Image © Carnegie Museum of Natural History

    Baryonyx had a low, narrow skull and long jaws lined with dozens of teeth. Remains of a fish have been found inside the ribcage of one skeleton of this dinosaur, supporting the notion that it ate fish at least some of the time. The large hands of Baryonyx were tipped with powerful claws and may have been useful for grasping slippery prey. www.naturalhistor... Image © Carnegie Museum of Natural History

    Named in 2009, Miragaia is among the most remarkable of the many new types of dinosaurs that have been discovered in recent years. Like its more familiar cousin Stegosaurus, it is a stegosaur, or plated dinosaur. But unlike other stegosaurs, Miragaia had an extraordinarily long neck that may have enabled it to browse at greater heights than could many other plant-eaters. www.naturalhistor... Image © Carnegie Museum of Natural History

    Even though the feathers of Caudipteryx look very much like those of today’s birds, this little dinosaur definitely could not fly. It is thought to be an earlier, more primitive relative of dinosaurs like Oviraptor. www.naturalhistor... Image © Carnegie Museum of Natural History

    Carnegie Museum of Natural History is home to the most complete skeleton of a baby Apatosaurus ever found. This fossil was originally thought to be that of a different kind of dinosaur, known as Elosaurus. Later studies determined that it belonged to a very young Apatosaurus. Based on recent estimates of how fast dinosaurs grew, this little plant-eater may have been less than one year old. www.naturalhistor... Image © Carnegie Museum of Natural History

    Paleo artist shows us new feathered dinosaur species, “The Chicken from Hell”

    A gigantic feathered dinosaur from the Lower Cretaceous of China