Dinosaur eggshell helped prove that they were warm-blooded

An international group of scientists has revealed the long-standing secret of dinosaurs regarding the issue of warm-bloodedness or cold-bloodedness of giant reptiles. According to a new study reported by Science Alert, ancient lizards were able to maintain body temperature above ambient temperature.

Paleontologists studied the fossilized remains of the eggshell of dinosaurs that lived in Canada 75 million years ago, including the herbivorous Mayasaur Maiasaura peeblesorum and the predatory bird-like troodon Troodon formosus. They also examined sauropod eggshells from Romania, estimated at approximately 69 million years old.

Using paleothermometry, the researchers analyzed the chemical bonds in the ancient carbonate mineral that makes up the shell. The location of the carbon and oxygen isotopes in the molecular lattice indicates the temperature at which the material is formed, that is, the temperature of the body of the mother dinosaur. It turned out that it was higher than the temperature in the environment. In other words, dinosaurs were endothermic (capable of internal heat generation), in contrast to exothermic animals that rely on heat from the environment.

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