Smoke Signals (1 янв 1800 г. до нашей эры – 1 янв 500 г. до нашей эры)
Описание:
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.Добавлено на ленту времени:
Дата:
1 янв 1800 г. до нашей эры
1 янв 500 г. до нашей эры
~ 1300 years
