Changes

Paleontologists once believed there were several species of ''Torosaurus'', judging from the large number of [[fossil]] remains, but it is now thought that there were just two, ''T. latus'' and ''T. utahensis''; a third species (''T. gladius'') was investigated and found to have been a is-assigned name applied to ''T. latus''.  According to evolution, they are descended from ''Psittacosaurus'', a small bipedal ornithopod whose remains were found in central Asia, and from there the ceratopsian line migrated to North America.<ref>''The Complete Book of Dinosaurs'', by Dougal Dixon, Anness Publishing, 2006</ref>

Paleontologists once believed there were several species of ''Torosaurus'', judging from the large number of [[fossil]] remains, but it is now thought that there were just two, ''T. latus'' and ''T. utahensis''; a third species (''T. gladius'') was investigated and found to have been a is-assigned name applied to ''T. latus''.  According to evolution, they are descended from ''Psittacosaurus'', a small bipedal ornithopod whose remains were found in central Asia, and from there the ceratopsian line migrated to North America.<ref>''The Complete Book of Dinosaurs'', by Dougal Dixon, Anness Publishing, 2006</ref>

There has been a recent claim that ''Torosaurus'' may be ''Triceratops'', albeit fully mature.  According to the ''Journal of Vertebrate Paleontology'',<ref>http://www.cbsnews.com/8301-501465_162-20012471-501465.html</ref><ref>http://www.vertpaleo.org/publications/index.cfm</ref> scientists theorize that ceratopsian dinosaurs, like all reptiles, continued to grow with age; this growth included changes to the frill which - according to the theory - changed from the deeply-curved solid bone of ''Tricertops'' into the "straight-backed" frill of ''Torosaurus'', a change of which also involved a ''loss'' of bone creating the ''fenestræ'' as a result.  According to Dr. Jack Horner, this process involved "metaplastic" bone which caused a change in the shape of the skull as the animal aged, i.e the backward pointing horns of a baby ''Triceratops'' turning into the forward pointing horns of an adult.<ref>http://www.sciencedaily.com/releases/2009/10/091031002314.htm</ref>

There has been a recent claim that ''Torosaurus'' may be ''Triceratops'', albeit fully mature.  According to the ''Journal of Vertebrate Paleontology'',<ref>http://www.cbsnews.com/8301-501465_162-20012471-501465.html</ref><ref>http://www.vertpaleo.org/publications/index.cfm</ref> scientists theorize that ceratopsian dinosaurs, like all reptiles, continued to grow with age; this growth included changes to the frill which - according to the theory - changed from the deeply-curved solid bone of ''Tricertops'' into the "straight-backed" frill of ''Torosaurus'', a change of which also involved a ''loss'' of bone creating the ''fenestræ'' as a result.  According to Dr. Jack Horner, this process involved "metaplastic" bone which caused a change in the shape of the skull as the animal aged, i.e. the backward pointing horns of a baby ''Triceratops'' turning into the forward pointing horns of an adult.<ref>http://www.sciencedaily.com/releases/2009/10/091031002314.htm</ref>

Creationists hold that ''Torosaurus'', along with other [[dinosaurs]], were created during the sixth day of [[creation week]], and did not survive the post-flood world.  In support of the [[great flood]] catastrophe, all known ceratopsian fossils were found in sedimentary (water-laid) rock.

Creationists hold that ''Torosaurus'', along with other [[dinosaurs]], were created during the sixth day of [[creation week]], and did not survive the post-flood world.  In support of the [[great flood]] catastrophe, all known ceratopsian fossils were found in sedimentary (water-laid) rock.