Stegosaurus had huge upright plates on its back that could grow as large as 30 inches. While scientists do not fully understand the function of these massive plates, they speculate that the stegosaurus could control its body temperature by regulating blood flow through them. A stegosaurus may have also been able to control its skin color this way, to either attract a mate or scare predators. Scientists call this color change “blushing.”
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