OPINION
REVEALED THE BIG PUZZLE ABOUT DINOSAURS In the first instalment of Jurassic Park there was a scene that was highly criticised by scientists when a dinosaur opened its big mouth in front of a mirror and its terrifying breath was shown in the glass, something that is impossible in a cold-blooded animal. Now we could say that that scene was not a mistake. The indisputable first great enigma of the dinosaurs is their extinction. Even today articles continue to be published trying to give an answer to the reason why they disappeared forever. The last hypothesis is that they were already "mortally wounded" as a species before the meteorite and affected by climate change that has already been verified. But what now seems to have an answer is for the second great enigma of the dinos: were they warm blooded? REPTILES OR BIRDS The blood of modern reptiles is cold, but the blood of modern birds is warm, like that of mammals, like ours. So where do dinosaurs fit in? A new study of the thigh bones of Plesiosaurus, Stegosaurus, Diplodocus, and Allosaurus compared to those of modern hummingbirds posits that the extinct animals were warm-blooded.
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