http://en.wikipedia.org/wiki/Golden_ratioI found my answer, but don't let that stop anyone from commenting. The first joint on your finger, multiplied out 9 times will equal your height, fractals we are.
I think the stone axe would be the oldest, the local natives were using stone axes just 500 years ago. Copper was a used metal as well, not sure of dates.
I should reread 70 and 90, for the umpteenth time.
Tim
