Smoke Signals (1 ene 1800 año aC – 1 ene 500 año aC)
Descripción:
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.Añadido al timeline:
fecha:
1 ene 1800 año aC
1 ene 500 año aC
~ 1300 years
