24 Apr - 06 Jun 2009
The Egyptians divided the day to 12 parts as early as 1500 BC. The Greeks added another 12 to count the hours of the night. Without artificial light, humans of an older time period regarded sunlit and dark periods as two opposing realms rather than as part of the same day. Once both the light and dark hours were divided into 12 parts, the concept of our time could emerge.