The Egyptians had large black obelisks to track the movement of the sun.
The Greeks had a water powered escapement mechanism, which transferred rotational energy into intermittent motions.
The Chinese had a mercury powered escapement mechanism, developed in the 10th century.
Today we have modern clocks, and we also have network time protocol.
The tracking of time grew in importance alongside the sophistication of society. Ancient societies needed time keepers to regulate growing aspects of their civilizations–including business, political, even social activities. These mechanisms grew more sophisticated throughout the centuries, until the advent of mechanical clocks using wheels and balance springs.
Today, much of the world operates under a standard 24-hour day, kept track with sophisti