[Lurking Libertarian]

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 don't think most of those pictures are that "clear." The "pterodactyl," for example, looks more like an eagle to me. Besides, there are some pretty complete dinosaur skeletons lying close to--sometimes on-- the surface out west.

[Wordsmith]

The "pterodactyl," for example, looks more like an eagle to me.

The long neck makes me think heron, or maybe goose. Goose that charged me once looked a lot like that.