From smoke signals to Email : keeping in Touch
From the stone Age to the present, people have shown a desire to send messages to one another over long distances.
In ancient times, according to one story, a chain of fires on mountaintops was used to relate the news of the fall of Troy to people in Greece. In the past, native people in the Americas used smoke from fires to transmit messages. They developed a code-in which certain combinations of smoke rising had special meanings. For example, two paralle columns of smoke indicated the successful return of a war party.