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20 Feb 150 Jahr v. Chr. - SMOKE SIGNAL

Beschreibung:

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

Zugefügt zum Band der Zeit:

Technology Change over the Years

ByOlivia Xiao
26 Nov 2018

Datum:

20 Feb 150 Jahr v. Chr.
Jetzt
~ 2175 years ago
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