Changes

==History==

==History==

[[Image:Osborn.jpg‎‎|thumb|right|[[Henry Fairfield Osborn]] was president of the American Museum of Natural History in New York City from 1908 to 1935.]]

[[Image:Osborn.jpg‎‎|thumb|right|[[Henry Fairfield Osborn]] was president of the American Museum of Natural History in New York City from 1908 to 1935.]]

Meriwether Lewis and William Clark found the skeleton of a "monsterously large fish" in what is now Gregory County, South Dakota in 1804.<ref>Hunter, Francis, [http://franceshunter.wordpress.com/2010/01/13/lewis-clark-and-the-monstrous-large-fish/ Lewis & Clark and the “Monstrous Large Fish”]", January 13, 2010.</ref> The skeleton is over 45 feet long and was later identified as the aquatic dinosaur ''plesiosaur''. The first scientifically described dinosaur was ''Megalosaurus'', reconstructed by William Buckland in 1822. It is a large carnivorous reptile of the Middle Jurassic Period, and was found in Britain. David Owen created the "dinosaur" classification in 1842 to accommodated this specimen, as well as ''Iguanodon'' and ''Hylaeosaurus,'' two similar specimens described somewhat later. These three dinosaurs were reconstructed and displayed at the Crystal Palace in London as part of the Exhibition of 1851.

Meriwether Lewis and William Clark found the skeleton of a "monsterously large fish" in what is now Gregory County, South Dakota in 1804.<ref>Hunter, Francis, [http://franceshunter.wordpress.com/2010/01/13/lewis-clark-and-the-monstrous-large-fish/ Lewis & Clark and the “Monstrous Large Fish”]", January 13, 2010.</ref> The skeleton is over 45 feet long. It was later identified as that of the aquatic dinosaur ''plesiosaur''. Clark also collected bones at the [[Hell Creek Formation]] in Montana, which later became the most renowned of all paleontology sites. The first scientifically described dinosaur was ''Megalosaurus'', reconstructed by William Buckland in 1822. It is a large carnivorous reptile of the Middle Jurassic Period, and was found in Britain.

In 1858, ''Hadrosaurus'' was found in a mineral pit in New Jersey. It was put on display at the Philadelphia Academy of Natural Sciences in 1868. In 1869, Edward Drinker Cope (1847-1897) reconstructed ''plesiosaur''. Othniel Charles Marsh (1831-1899) was able to establish that Cope put the skull on the wrong end, humiliating Cope. The long and bitter rivalry that followed attracted great public attention. While previous skeletons had been discovered by accident, Cope and Marsh went on expeditions to arid parts of the American West. The two found numerous fossils in Wyoming, Colorado, and New Mexico. Their museums worked out the techniques for mounting and displaying them. The feud reached a climax in 1890 as letters containing bitter recriminations were published in ''The New York Herald''. Congress responded by dismissing Marsh and revoking funds for his entire department.

 

In 1858, ''Hadrosaurus'', the so called "duck-billed dinosaur", was found in a mineral pit in New Jersey. It was put on display at the Philadelphia Academy of Natural Sciences in 1868. In 1869, Edward Drinker Cope (1847-1897) reconstructed ''plesiosaur''. Othniel Charles Marsh (1831-1899) was able to establish that Cope had put the skull on the wrong end of the skeleton, humiliating Cope. The long and bitter rivalry that followed attracted great public attention. While previous skeletons had been discovered by accident, Cope and Marsh went on expeditions to arid parts of the American West. The two found numerous fossils in Wyoming, Colorado, and New Mexico. Their museums worked out the techniques for mounting and displaying them. The feud between them reached a climax in 1890 as letters containing bitter recriminations were published in ''The New York Herald''. Congress responded by dismissing Marsh and revoking funds for his entire department.

 

In 1905, [[Henry Fairfield Osborn]] applied the name ''Tyrannosaurids rex'', meaning "“king of the tyrant lizards" to a fossil recently discovered at Hell Creek. This fearsome predator, perhaps 21 feet tall, would capture public imagination. In 1909–23, 350 tons of dinosaur bones were removed from what is now Dinosaur National Monument in Colorado under the direction of paleontologist Earl Douglass of the Carnegie Museum in Pittsburgh, Pennsylvania.

==Dinosaur species==

==Dinosaur species==