Back in the day, smoke signals were good enough for the American Indians. They would control the size and shape of the puffs to signify different things. In this way, coherent messages could actually be relayed over a distance. But poor visibility or a torrential downpour would make them pretty much useless. And smoke puffs weren’t varied enough to convey anything truly complex anyway.
Ring Mah Bell?
Then along came Thomas Graham Bell and his marvelous invention, the te...
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