Rock & Gem

The Debate Continues!


e debate goes back to the 1960s and earlier. It reached its heyday in the 1980s. Were dinosaurs coldbloode­d like reptiles, or warm-blooded like mammals? Many scientists came to the conclusion they were neither reptilian nor mammalian, but avian, or bird-like.

A new study reinforces this concept. As reported in the journal Nature, scientists examined bones of several extinct dinosaurs and, for the sake of comparison, a living hummingbir­d.

eir conclusion? Chemical and infrared spectrosco­py analyses show dinosaurs (at least, those in the study) were indeed warm-blooded and had a high metabolism comparable to today’s birds (i.e., avian dinosaurs).

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