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p. 915. Dinosaurs: their biology and way of lifelocked

  • David Norman


‘Dinosaurs: their biology and way of life’ considers the research into whether dinosaurs were cold-blooded (ectothermic) like modern reptiles, or warm-blooded (endothermic) like mammals and birds, or whether dinosaurs exploited other types of metabolic regime. There is a wide range of dinosaur physiologies from the fossil record, which along with evidence from fossil bone histology and what is known about the climate of the Mesozoic Era, suggests dinosaurs might have been endotherms. The conclusion, however, is that most dinosaurs were greenhouse-world dwelling ectothermic homeotherms, perfectly capable of sustaining high activity levels, but very small dinosaurs (and their descendants, the true birds) were obliged to develop full-blown bird/mammal-like endothermy.

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