Sundials - World's Oldest Clocks

North American Sundial Society

Observing solar alignments and seasons of the year has been done since Neolithic times.  Evidence of these ancient astronomers lies in their monuments of Stonehenge, Newgrange, the Orkneys, and a host of other alignment stones from Australia, Peru, the plains of Canada and around the world.

Tomb of Newgrange 17th Century Ivory Sundial Found at Jamestown Equation of Time - Clocks and Sundials
{wmv}Cultivating_Life{wmv} {wmv}Tomb_of_Newgrange|300|200{/wmv}
Cultivating Life - Sundial Discussing by Fred Sawyer Tomb of Newgrange - wmv