Smoke Signals (11h 11min, aug 29, 1800 y BC – 22h 44min, jun 30, 500 y)
Description:
For a long time, Smoke Signals were used as the main form of communication. This is because it could be used over a long distance. In 150BC, the Greeks created a system of alphabetic characters and converted it into numeric characters. This way they could convert it using pairs of torches into smoke signals.
Added to timeline:
Communication Systems
Geo Homework
Date:
