Huxley reasoned that flying vertebrates must have been warm-blooded because flying implies a high rate of metabolism, which in turn implies a high internal temperature.
He found that, for dinosaurs weighing from a few kilograms to tonnes, the power their muscles needed was far too high for the animals to have been cold-blooded.
他发现，对体重从几公斤至几吨的恐龙来说，它们的肌肉所需要的能量极其高，是冷血动物所无法提供的。
3
Most dinosaurs have erect postures and therefore it has been suggested that this indicates that they had high activity levels and were warm-blooded .