@futurebird I'd never thought of that. That's interesting.
One hypothesis is that these drawing are usually highly stylized. An animal, or a person needs to be reduced and abstracted to a kind of stick figure before it can be drawn.
Perhaps because we read so much into the face and because the is so much subtlety there, it took much longer for us to collectively abstract the face to the level of a pictogram, where we felt comfortable drawing it.
https://writing.exchange/@ptmesis/113537891909692160
@ptmesis
Possibly. But many of the drawings of animals are not abstracted, they are absurdly accurate and your average non-artist couldn't render such accurate images of animals.
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