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20 feb 150 anni a. C. - SMOKE SIGNAL

Descrizione:

The earliest form of long distance communication. Greek historian, Polybius, developed a system of alphabetical smoke signals by holding sets of torches in pairs.

Aggiunto al nastro di tempo:

Technology Change over the Years

ByOlivia Xiao
26 nov 2018
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0
336

Data:

20 feb 150 anni a. C.
Adesso
~ 2177 years ago
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