It's only been a couple of hundred years since we identified the first dinosaur fossils. Since then, we've learned an awful lot about them, but our knowledge is limited by what they left behind. Since dinosaurs were categorized as reptiles, we envisioned them as a prehistoric version of known lizards, with muscles and scaly skin draped over the bones. In the last few decades, better science tools have enabled us to detect clues about how wrong we were.
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