Copper telegraph cable first linked cities beginning around the 1830's. A submarine cable was laid under the English Channel in the 1850's using a continuous length of copper coated with natural rubber. In 1858, the first of several trans-Atlantic cables was laid. A US stamp commemorated the feat:
We may think that we are now safely linked by satellite, but the bulk of Internet communication is still via cable transmission. Not copper, but fiber-optic transmission:
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*The title is a pun/homage to Samuel F.B. Morse's first telegram: "What hath God Wrought?"