The question of whether dinosaurs were warm or cold-blooded has been disputed by palaeontologists for decades. Now scientists have proposed that the blood of T-Rex may have occupied a tepid zone in between.
The conclusion, based on the analysis of the metabolic rates of nearly 400 living and extinct animals, suggests that dinosaurs would have had some internal control over body temperature, but unlike modern mammals, their body temerature would fluctuate.
This “Goldilocks solution”, which is found in tuna fish and sharks, would make dinosaurs so-called mesotherms.
Previously dinosaurs had presented an apparent paradox. Although cold-blooded species expend less energy,