[Wordsmith]

we're talking about actual drawings made by people thousands of years ago that clearly depict dinosaur species that have been discovered by more modern day scientists.

I dispute that they "clearly depict" these species. IMO, the "pterosaur" could be a heron, and the "triceratops" could be a stylized buffalo, ox, or rino. The stegosaur and pleisiasaur are more compelling, but still debatable.

How could these ancient peoples have known what dinosaurs looked like if they could never have seen one? Could they extrapolate their appearance based on a couple of bones?

Not all fossils are just "a couple of bones." And even a couple of bones can be instructive, depending on their relationship to each other when found, and which bones they are.

[Elsie]

And even a couple of bones can be instructive, depending on their relationship to each other when found, and which bones they are.

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And this is just what the DC police are trying to find out in the Chandra Levy death.........