Dinosaurs fit in an intermediate class between warm and cold blooded animals, a study in the journal Science claims.
Scientists compared the growth rates of hundreds of living and extinct species, using growth rings and bone size to calculate the rates for dinosaurs.
They linked growth rate to metabolic rate, the measure of energy use that divides warm and cold blooded animals.
The study suggests that the dinosaurs fall into a middle category, in a fresh contribution to an enduring debate.
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