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The 20th Century was a period of unprecedented technological advancement in almost every field. Communication in particular was revolutionized during that time, and each breakthrough would contribute in its own way to today’s era of near-instantaneous distribution of information. The first telephone exchange in North America became operational in 1878. But like the telegraph before more »
We’ve talked about the most famous American postage stamp. But the Inverted Jenny, though highly valuable, is not the rarest. That honor belongs to the stamp known as the Z Grill. In the stamp world, a grill is a pattern of indentations pressed into the paper. These indentations serve two purposes: first, they allow the more »
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