There, fixed it for you.
Not quite. You "fixed" my problem by dropping the remarkable, exclusive propensity of human beings to create art entirely out of the question. Which was the very thing I was trying to point to.
It seems to me FWIW that the YEC timetable must be way off, if it cannot account for the "extantness" of the Lascaux artist(s), who must have been "human."