Eggshells suggest dinosaurs were warm-blooded
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https://news.sky.com/story/eggshells-suggest-dinosaurs-were-actually-warm-blooded-11937100
New research by scientists at Yale in the US has analysed the chemistry of dinosaur eggshells, finding the way oxygen and carbon atoms were arranged within them suggested they were formed within warm-blooded bodies.
>"Dinosaurs sit at an evolutionary point between birds, which are warm-blooded, and reptiles, which are cold-blooded," said Dr Robin Dawson, who conducted the research.
>"Our results suggest that all major groups of dinosaurs had warmer body temperatures than their environment," Dr Dawson added, regarding the research conducted while she was a doctoral student in geology and geophysics at Yale.
The research follows a new theory which suggests that as dinosaurs evolved into birds they shrank in order to become warm blooded.
Reptiles are cold blooded, or ectothermic, which means they aren't capable of controlling their own body temperature. Mammals and birds, which are directly descended from a group of dinosaurs called theropods, are warm blooded, or endothermic, meaning they produce their own body temperature. Generating your own heat is an expensive lifestyle for animals and requires a lot more energy consumption. However, it provides benefits as it allows animals to function at a higher level when there aren't any external heat sources nearby, such as during the night or winter.
Shells from species including the meat-eating theropod Troodon, the duck-billed Maiasaura, and the Megaloolithus, were all found to have been grown at temperatures significantly above that of the environment around them.
>"What we found indicates that the ability to metabolically raise their temperatures above the environment was an early, evolved trait for dinosaurs," Dr Dawson said.
New research by scientists at Yale in the US has analysed the chemistry of dinosaur eggshells, finding the way oxygen and carbon atoms were arranged within them suggested they were formed within warm-blooded bodies.
>"Dinosaurs sit at an evolutionary point between birds, which are warm-blooded, and reptiles, which are cold-blooded," said Dr Robin Dawson, who conducted the research.
>"Our results suggest that all major groups of dinosaurs had warmer body temperatures than their environment," Dr Dawson added, regarding the research conducted while she was a doctoral student in geology and geophysics at Yale.
The research follows a new theory which suggests that as dinosaurs evolved into birds they shrank in order to become warm blooded.
Reptiles are cold blooded, or ectothermic, which means they aren't capable of controlling their own body temperature. Mammals and birds, which are directly descended from a group of dinosaurs called theropods, are warm blooded, or endothermic, meaning they produce their own body temperature. Generating your own heat is an expensive lifestyle for animals and requires a lot more energy consumption. However, it provides benefits as it allows animals to function at a higher level when there aren't any external heat sources nearby, such as during the night or winter.
Shells from species including the meat-eating theropod Troodon, the duck-billed Maiasaura, and the Megaloolithus, were all found to have been grown at temperatures significantly above that of the environment around them.
>"What we found indicates that the ability to metabolically raise their temperatures above the environment was an early, evolved trait for dinosaurs," Dr Dawson said.
