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Cast of the known material of Acheroraptor, on display at the Smithsonian's National Museum of Natural History's exhibit The Last American Dinosaurs.

Muttaburrasaurus The plants, animals and climate of the Australian continent have changed dramatically over long periods of time. Imagine this giant creature roaming the luxuriant wet forests that covered parts of the continent in the Cretaceous period, about 100-110 million years ago. The Muttaburrasaurus ambled along on all four legs or stood on its hind legs. Its large teeth were well adapted to eat tough vegetation such as the leathery foliage of the evergreen forests of Araucaria trees, ancient relatives of the bunya pine of south-eastern Queensland. In 1963, grazier Doug Langdon discovered the fossilised bones of a dinosaur on his property near Muttaburra in central-west Queensland. It was one of the most complete dinosaur skeletons found in Australia. The bones belonged to a new species of ornithopod and palaeontologists named it Muttaburrasaurus langdoni. Cast of Muttaburresaurus langdoni 1987 made by Queensland Museum, Brisbane National Museum of Australia

natural silicone cast of the holotype of Lycorhinus angustidens (UCRC PVC10). Abbreviations: 3-10 dentary tooth 3-10 Fa-j tooth-to-tooth wear facet a-j f accessory facet. Scale bars equal 1 cm in C and 3 cm in D.

A cast of BYU 9025, the holotype fossil of the sauropod dinosaur Supersaurus, a giant scapulocoracoid measuring 2.4m long. • The source photo was taken at the Dinosaur Journey Musuem. • Notes regarding the file; This image was edited and extracted from the original seen here. [1] The Photoshop CC lens correction profile and a 'perspective warp' correction were applied.

Skeletal cast mount of Appalachiosaurus montgomeriensis on display at the Tellus Science Museum in Cartersville, Georgia.

A, Four consecutive track casts of Minisauripus isp.; B, Natural impression slab of second left and right feet tracks; C, Isolated fifth track of Minisauripus isp.

Riojasaurus skull cast, Copenhagen.

Photograph of a fossil cast of a Keichousaurus hui skeleton taken at the North American Museum of Ancient Life.

Skull of Pistosaurus longaevus (cast - USNM 16107) in right, left and posterior views.

Skull of Pistosaurus longaevus (cast - USNM 16107) in right, left and posterior views.

Skull cast of Anchiceratops ornatus (original specimen: TMP 1983.001.0001) on display at the University of Michigan Museum of Natural History.

NMV P157390, a referred maxilla of Atlascopcosaurus loadsi (top), and NMV P166409, a cast of the holotype maxilla of Atlascopcosaurus loadsi (bottom).

Archaeopteryx lithographica, specimen displayed at the Museum für Naturkunde in Berlin. (This image shows the original fossil - not a cast.)

Wintonopus latomorum cast in Natural History Museum.

An Ankylosaurus head (cast of specimen AMNH 5214), on display at the Museum of the Rockies in Bozeman, Montana. This is from a specimen collected in Custer County, Montana. The Ankylosauria were armored dinosaurs that lived from 122 million years ago to 66 million years ago in western North America, Europe, and East Asia. There were two subgroups: The Nodosauridae and Ankylosauridae. The Ankylosauridae contained six species, and a single subfamily -- the Ankylosaurinae. There 18 genus within the subfamily, of which Ankylosaurus is the best known. Ankylosaurus as the last of these, and lived 65.5 to 66.5 million years ago. Ankylosaurus was about 20.5 feet long, 5 feet wide, and 5.5 feet tall at the hip. It walked on all fours, with the rear legs longer than the front ones. They ripped vegetation, and swallowed it whole. Their defining feature was their armor. They body was covered in thick, heavy bony plates, and most of the plates were fused together to make them even stronger. Embedded in the skin were more knobs of bone, and the outer skin above these knobs covered in keratin (the same stuff fingernails are made of). Ankylosaurus had a tail club, which consisted of several large osteoderms fused to the last few tail vertebrae. Ankylosaurus was discovered in 1908.

Cast of Gorgosaurus specimen ROM 1247 (sometimes labelled as Albertosaurus) at the Royal Tyrrell Museum.