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1 ene 150 año aC - Smoke signals used
Descripción:
Greek historian Polybius develops a complex system of alphabetical signals sent by holding sets of torches in pairs
Añadido al timeline:
Timeline of Communications
By
Andrew
13 nov 2019
1
0
324
fecha:
1 ene 150 año aC
Ahora mismo
~ 2175 years ago
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