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dec 6, 150 BC - Smoke signals
Description:
The smoke signal was one of the earliest forms of long distance communication and was first used by the Ancient Chinese people to transmit news, signal danger, or gathering people.
Added to timeline:
Technology Timeline
By
Alexandra Paino
22 Nov 2018
0
0
318
Date:
dec 6, 150 BC
Now
~ 2178 years ago
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