We are a commune of inquiring, skeptical, politically centrist, capitalist, anglophile, traditionalist New England Yankee humans, humanoids, and animals with many interests beyond and above politics. Each of us has had a high-school education (or GED), but all had ADD so didn't pay attention very well, especially the dogs. Each one of us does "try my best to be just like I am," and none of us enjoys working for others, including for Maggie, from whom we receive neither a nickel nor a dime. Freedom from nags, cranks, government, do-gooders, control-freaks and idiots is all that we ask for.
As pointed out elsewhere, how did these drawings survive outdoors in a tropical climate for thousands of years? In fact, how did they survive the plant life that overgrows everything there?
I once was in the Yucatan and walked into the jungle to visit a thousand year old Mayan temple. Everything was covered in plant growth as we walked along. When we finally got to the temple, the view from the top revealed temples all the way to the horizon that weren’t cleared for tourists. They were completely covered with plants and trees. After 12 thousand years they’d be completely gone.
The thing that struck me was how fresh the paintings looked. They certainly didn't appear to have weathered much in 12,500 years.
Another thing mentioned was that how high some of the paintings were was attributed to the painters using ladders. If anything the higher paintings were at ground level and the ground eroded. But then, why didn't the paintings weather?