Methods of timekeeping can be reconstructed for the prehistoric period from at
least the Neolithic. The natural units for timekeeping used by most
Introduction. It's the year 2000. We stand at the dawn of a new century, a new millennium. We can't even begin to imagine what the next thousand years will ...
Oct 14, 2012
Dec 26, 2010
In the earliest times, human beings calculated time by observing the periods of light and darkness that alternated continuously. The solar day is considered the ...
Sep 13, 2012