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September 30, 2021
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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:

14 Nov 2018
1
0
139
Timeline on the develpoment of technology

Date:

jan 1, 150 BC
Now
~ 2173 years ago
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