Time waits for no man. Keeping this mind, we set about inventing clocks to synchronize ourselves with lunar cycles. It was an impressive leap, beginning some 10,000 years ago when the Egyptians came up with sundials in 2100 BC. Sundials, or shadow clocks, first used by Sumerians, worked on the premise of measuring the length of shadows to deduce time of day. Weather played spoilsport as on cloudy days, and when the months changed, shadows would not correspond with the markings. The Romans tried to do better by pilfering Cleopatra