herbie herbie:
It already is.
Metric system was derived from natural observable measurements. Be that not not that accurate at the time.
Time was derived the same way.
Time divisions; 60 minutes, 60 seconds, actually come from the ability to use 5 fingers of one hand and the 12 knuckles of the other to count to 60. IIRC, it was taken from the ancient Sumerians.