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jan 1, 150 BC - Smoke Signals
Description:
Greek Historian, Polybius made complicated alphabetical smoke signlas by holding them in pairs.
Added to timeline:
Timeline on the develpoment of technology
By
Esha Motti Abraham
14 Nov 2018
1
0
427
Date:
jan 1, 150 BC
Now
~ 2176 years ago
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