In DepthPaleontology

Dinosaur metabolism neither hot nor cold, but just right

Science  13 Jun 2014:
Vol. 344, Issue 6189, pp. 1216-1217
DOI: 10.1126/science.344.6189.1216

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Summary

Paleontologists have struggled for 50 years to determine whether dinosaurs were cold-blooded like today's reptiles or warm-blooded like most modern mammals and birds. A study on page 1268 examines the growth and metabolic rates of nearly 400 living and extinct animals, and concludes that neither was right. Instead, dinosaurs had an in-between metabolism.