dec 31, 151 BC - Polybius Develops Alphabetical Smoke System
Description:
In the year 150 BC, Greek historian Polybius develops alphabetical smoke signals sent out by holding pairs of torches. Smoke signals were used to transmit news, signal danger or gather people. It was commonly used in Ancient China and by North American Indigenous Tribes.Added to timeline:
Date:
dec 31, 151 BC
Now
~ 2178 years ago