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- The_Dinosaur_Heresies abstract "The Dinosaur Heresies: New Theories Unlocking the Mystery of the Dinosaurs and Their Extinction was a 1986 book published by Robert T. Bakker, a prominent paleontologist.The book sums up the extant evidence which indicates that dinosaurs, rather than being cold-blooded and wholly lizard-like, were in fact warm-blooded, agile creatures more similar to modern birds than to lizards or other reptiles. Although controversial on publication in 1986, the passage of time has proven Bakker correct in many respects, and much of Dinosaur Heresies now represents the prevalent view in paleontological circles (although other parts have been outdated by more current research).[citation needed]The main arguments used to show that dinosaurs were warm blooded are: Almost all animals that walk upright today are warm-blooded, and dinosaurs walked upright. The hearts of warm-blooded animals can pump much more effectively than the hearts of cold-blooded animals. Therefore, the giant Brachiosaurus must have had the type of hearts associated with warm-blooded animals, in order to pump blood all the way up to its head. Dinosaurs such as Deinonychus led a very active life, which is much more compatible with a warm-blooded animal. Some dinosaurs lived in northern latitudes where it would be impossible for cold-blooded dinosaurs to keep warm. The rapid rate of speciation and evolution found in dinosaurs is typical of warm blooded animals and atypical of cold blooded animals. The predator/prey ratio of predatory dinosaurs to their prey is a signature trait of warm-blooded predators rather than cold-blooded ones. Birds are warm-blooded. Birds evolved from dinosaurs, therefore a change to a warm-blooded metabolism must have taken place at some point; there is far more change between dinosaurs and their ancestors, the archosaurs, than between dinosaurs and birds. Warm-blooded metabolisms are evolutionary advantages for top predators and large herbivores; if the dinosaurs had not been warm-blooded there should be fossil evidence showing mammals evolving to fill these ecological niches. No such evidence exists; in fact mammals by the end of the Cretaceous had become smaller and smaller from their mammal-like-reptile ancestors. Dinosaurs grew rapidly, evidence for which can be found by observing cross-sections of their bones.".
- The_Dinosaur_Heresies author Robert_T._Bakker.
- The_Dinosaur_Heresies isbn "0-8217-5608-7".
- The_Dinosaur_Heresies mediaType Hardcover.
- The_Dinosaur_Heresies numberOfPages "165".
- The_Dinosaur_Heresies oclc "36439291".
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- The_Dinosaur_Heresies author Robert_T._Bakker.
- The_Dinosaur_Heresies country "United States".
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- The_Dinosaur_Heresies language "English".
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- The_Dinosaur_Heresies name "The Dinosaur Heresies".
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- The_Dinosaur_Heresies pages "165".
- The_Dinosaur_Heresies publisher "Citadel Press".
- The_Dinosaur_Heresies releaseDate "1986".
- The_Dinosaur_Heresies subject Category:1986_books.
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- The_Dinosaur_Heresies comment "The Dinosaur Heresies: New Theories Unlocking the Mystery of the Dinosaurs and Their Extinction was a 1986 book published by Robert T. Bakker, a prominent paleontologist.The book sums up the extant evidence which indicates that dinosaurs, rather than being cold-blooded and wholly lizard-like, were in fact warm-blooded, agile creatures more similar to modern birds than to lizards or other reptiles.".
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