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Dinosaur intelligence
Dinosaur intelligence has been a point of contention for paleontologists. Non-avian dinosaurs were once regarded as being unintelligent animals but have largely been appraised more generously since the dinosaur renaissance. This new found optimism for dinosaur intelligence has led to highly exaggerated portrayals in pop-cultural works like ''Jurassic Park''. Paleontologists now regard dinosaurs as being very intelligent for reptiles, but generally not as smart as (modern) mammals. Some have speculated that if the Cretaceous–Paleogene extinction event had not occurred, the more intelligent forms of small theropods might have eventually evolved human-like levels of intelligence. Popular misconceptions of dinosaur neurology include the concept of a second brain in the pelvis of stegosaurs and sauropods.
==Dinosaur brain volume and encephalization quotient==
Traditional comparisons of brain volume to body mass in dinosaurs have estimated brain size as the volume of the endocast.〔 However, the brain of the modern reptile genus ''Sphenodon'' fills only about half of its endocranial volume.〔 Some paleontologists used this fifty percent estimate in their estimates of dinosaur brain volume.〔 Other workers have observed that details on the endocranial surface indicates that some fossil reptiles had brains that occupied a much larger portion of the endocranium.〔 Hans Larsson notes that the transition from reptiles to birds prevents using a set ratio from being a valid approach to estimating the volume of the endocranium occupied by a dinosaur's brain.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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