Smoke Signals (1 jan 1800 ano antes da era comum – 1 jan 500 ano antes da era comum)
Descrição:
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.Adicionado na linha do tempo:
Data:
1 jan 1800 ano antes da era comum
1 jan 500 ano antes da era comum
~ 1300 years
