In response to, "Why not even consider that the Ancient tribes 5yr old kids were writing on the walls?" First of all, did you mean, "Why not even consider that it could have been that ancient tribes had 5 year old kids writing on the walls?"
Funny how I'm Native but speak better English.
Anyway... it is amazing how fast non-Indian people dismiss anything that Native people knew before Europeans. My grandmother, who was a Sioux woman, when she heard of new scientific findings would often say, "We already knew that." There is so much education that most of you on this post have obviously missed out on... pity and shame on the adult for not "ever even" bothering to find out.
We already knew that.
Yeah My Samar Filipino Mom said the same thing, even to the extreme that we never got to see a Dr. I had to go on the bus to get care...funny now she is 87 she takes all the White Mans pills to stay healthy and I refuse them.
Funny.
So my English writing is poor.
Well Partner ya got me there.
Sorry it does not intend to get better, either.