Most dinos had warm blood

Scientists have solved one of the oldest mysteries about dinosaurs: whether they had cold or warm blood. The temperature of an animal’s blood is linked to its metabolism – the rate at which its body extracts energy from food. Metabolism affects how much an animal needs to eat, how active it can be and even where it can survive, so understanding their metabolisms is a huge breakthrough in learning about how these extinct beasts lived. Warm-blooded animals like mammals and birds have fast metabolisms; they need to eat frequently but can be active even in cold climates. Cold-blooded animals such as reptiles have slower metabolisms and can eat less often but their activity depends on the temperatures around them and they get sluggish when they cool down too much. Some…

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The Week Junior (Digital) - 1 Issue, 339

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