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Ancient communication methods
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The preoccupation with information is not peculiar to the information age. People have always explored new ways to carry information farther, faster. The ancient empires of the Egyptians, the Babylonians, the Romans, the Mongols, and the Incas all reached a geographic size that competes easily with the largest independent states today. How did the rulers of those empires stay abreast of developments in the remote corners of their territory, such as attacks from neighbors? They developed long-distance communication networks as innovative for their time as our networks are for ours.
Pigeons
The relay system
Fire beacons
Optical telegraph system
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