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- John_Ruben abstract "John A. Ruben, researcher in Zoology and Vertebrate paleontology at the Oregon State University in Corvallis. A big deal of his published research is focused on studying the respiratory system in birds (in order to contradict the theory of theropodan ancestry of birds), as well as their metabolism.Ruben has questioned for many years the theory that birds descend from small carnivorous dinosaurs (Theropoda). He suggest theropods had a diaphragma driven respiratory system which could not have evolved into the complex air sacs in birds (but the presence of air sacs in saurischian dinosaurs has been demonstrated by highly pneumatic fossil bones of e.g. Aerosteon and Tataouinea). While some have claimed Ruben's research to be flawed, his papers have, nevertheless, appeared in highly regarded, heavily peer-reviewed journals such as Science, Nature and the Journal of Morphology. He has done some research to the dinosaurs Scipionyx and Sinosauropteryx, from which he gives his arguments. Ruben was also part in the 2009 discovery of a close correlation between the immobilized thighbone and complex respiratory systems in birds.Research on the fossil animal Microraptor has also led Ruben to suggest that Dromaeosauridae, for a long time regarded as feathered dinosaurs actually represent flightless descendants of older birds, as he said: "We think the evidence is showing that these animals which is usually considered dinosaurs were actually descended from birds, not the other way around". Ruben see it more possible that perhaps a creature like the diapsid reptile Longisquama represents the ancestor to birds.".
- John_Ruben wikiPageExternalLink index.htm.
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- John_Ruben wikiPageWikiLink Aerosteon.
- John_Ruben wikiPageWikiLink Air_sac.
- John_Ruben wikiPageWikiLink Carnivore.
- John_Ruben wikiPageWikiLink Carnivorous.
- John_Ruben wikiPageWikiLink Category:American_paleontologists.
- John_Ruben wikiPageWikiLink Category:American_zoologists.
- John_Ruben wikiPageWikiLink Category:Living_people.
- John_Ruben wikiPageWikiLink Category:Oregon_State_University_faculty.
- John_Ruben wikiPageWikiLink Corvallis,_Oregon.
- John_Ruben wikiPageWikiLink Diaphragma.
- John_Ruben wikiPageWikiLink Diapsid.
- John_Ruben wikiPageWikiLink Dromaeosauridae.
- John_Ruben wikiPageWikiLink Feathered_dinosaur.
- John_Ruben wikiPageWikiLink Feathered_dinosaurs.
- John_Ruben wikiPageWikiLink Femur.
- John_Ruben wikiPageWikiLink Flightless_bird.
- John_Ruben wikiPageWikiLink Fossil.
- John_Ruben wikiPageWikiLink Longisquama.
- John_Ruben wikiPageWikiLink Metabolism.
- John_Ruben wikiPageWikiLink Microraptor.
- John_Ruben wikiPageWikiLink Oregon_State_University.
- John_Ruben wikiPageWikiLink Paleontology.
- John_Ruben wikiPageWikiLink Pulmonary_alveolus.
- John_Ruben wikiPageWikiLink Reptile.
- John_Ruben wikiPageWikiLink Respiratory_system.
- John_Ruben wikiPageWikiLink Respiratory_systems.
- John_Ruben wikiPageWikiLink Saurischia.
- John_Ruben wikiPageWikiLink Scipionyx.
- John_Ruben wikiPageWikiLink Sinosauropteryx.
- John_Ruben wikiPageWikiLink Tataouinea.
- John_Ruben wikiPageWikiLink Theropod.
- John_Ruben wikiPageWikiLink Theropoda.
- John_Ruben wikiPageWikiLink Thighbone.
- John_Ruben wikiPageWikiLink Vertebrate.
- John_Ruben wikiPageWikiLink Zoology.
- John_Ruben wikiPageWikiLinkText "John Ruben".
- John_Ruben hasPhotoCollection John_Ruben.
- John_Ruben name "Ruben, John".
- John_Ruben shortDescription "Zoologist".
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- John_Ruben wikiPageUsesTemplate Template:Persondata.
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- John_Ruben description "Zoologist".
- John_Ruben description "Zoologist".
- John_Ruben subject Category:American_paleontologists.
- John_Ruben subject Category:American_zoologists.
- John_Ruben subject Category:Living_people.
- John_Ruben subject Category:Oregon_State_University_faculty.
- John_Ruben type Agent.
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- John_Ruben type Paleontologist.
- John_Ruben type Scientist.
- John_Ruben type Zoologist.
- John_Ruben type Zoologist.
- John_Ruben type Person.
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- John_Ruben type Q215627.
- John_Ruben type Q5.
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- John_Ruben comment "John A. Ruben, researcher in Zoology and Vertebrate paleontology at the Oregon State University in Corvallis. A big deal of his published research is focused on studying the respiratory system in birds (in order to contradict the theory of theropodan ancestry of birds), as well as their metabolism.Ruben has questioned for many years the theory that birds descend from small carnivorous dinosaurs (Theropoda).".
- John_Ruben label "John Ruben".
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- John_Ruben sameAs John_Ruben.
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- John_Ruben wasDerivedFrom John_Ruben?oldid=564026238.
- John_Ruben givenName "John".
- John_Ruben isPrimaryTopicOf John_Ruben.
- John_Ruben name "John Ruben".
- John_Ruben name "Ruben, John".
- John_Ruben surname "Ruben".