The first mechanical clocks appeared in the 13th century bringing the concept of exact time - no longer just dawn, noon, mid-day - now 6:03, 12:00, and 3:20. Today our ability to divide and measure time has grown, for example in a cesium clock, to divide a second into 9,192,631,770 parts. In so doing, amazing as is that accomplishment, we may also miss something important.