A new study has given a new insight of the type of nests dinosaurs built for their eggs. Scientists have made conclusions based on the eggshells found at excavations. These eggshells are fragile but are more than 150 million years old!
The scientists studied more than 29 types of eggs and concluded most dinosaurs used dirt and vegetation to cover the eggs – much like the primitive way crocodiles use in nesting. However, other dinosaurs that resembled birds followed the egg laying and egg nesting methods of birds of today. That is, these bird-like dinosaurs laid their eggs in the open.
Scientists have analyzed the eggshells to determine the body temperatures these dinosaurs may have had. This is an important finding because, depending on the body temperature, scientists are able to gauge whether theses long -extinct animals were very active possessing a higher body temperature or more sedate, much like the cold-blooded lizards and crocodiles today and capable of only extremely short bursts of energy.
The studies did find the temperature – it was neither too hot nor too cold. It was mesotherms in nature, that is somewhere in between the temperatures. In addition, the temperature differed between dinosaur species. A similar study that analyzed fossilized bones had much the same conclusion – that is, dinosaurs with mesotherms.
These studies are groundbreaking, and certainly answer many questions. The findings further debunk arguments that all dinosaurs were cold blooded and sluggish.