Cold, Warm or just Right? Were Dinosaurs actually cold-blooded?

Dinosaurs (meaning fearfully-great lizard – Richard Owen 1842) are reptiles, so are therefore cold-blooded. Yes? Well maybe not….

A quite aptly named theory suggests that dinosaurs were neither cold blooded or warm-blooded, but instead “dinosaur-blooded”. Combining elements from both cold-blooded and warm-blooded strategies with a changing metabolism over the animal’s lifetime. By using Annuli, which are concentric rings of growth used to age individuals (like the rings of a tree) scientists were able to deduce the metabolism of a number of species (including Tyrannosaurus, Allosaurus, Tenotsaurus and a range of present-day species) and found that their growth rates were not characteristic of either warm or cold-blooded animals.

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