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Not too hot, not too cold: Mesothermy discovered in dinosaurs

Chiamaka Nwakeze | Science Recorder | June 15, 2014

Not too hot, not too cold: Mesothermy discovered in dinosaurs

In Friday’s issue of Science, John M. Grady and his colleagues at the University of New Mexico (UNM) have found evidence for “mesothermy” in dinosaurs.

Paleontologists have often debated whether dinosaurs were warm-blooded (endotherms) like birds and mammals or cold-blooded reptiles (ectotherms) like reptiles and amphibians.

Endotherms are animals that maintain a constant body temperature even when environmental temperatures fluctuate. In contrast, the environment regulates the body temperature of ectotherms and thus their metabolic rate tends to be lower than the metabolic rates of endotherms, which must maintain a high, constant body temperature.

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