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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

ByEsha Motti Abraham

14 Nov 2018

1

0

509

Date:

jan 1, 150 BC

Now

~ 2177 years ago

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