When was this written ???
The numbers dont match...If he was young in 1972 he should be in his 50s now...
Well, his math education probably isn’t up to snuff, so the math not matching checks out.
If only there was an article date included the top here on Free Republic between the source and author's name.
Here’s a follow up when he returned to the jungle......it’s quite interesting, his father is mental and so he has a childs mentality. But pretty amazing how they made tools.
https://www.youtube.com/watch?v=N6pcYTGezRw