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The pony express was a mail system much like a relay race. Each rider traveled about 75 miles before the next rider took the mail the nest 75 miles.
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The pon y express was put out of businees by the telegraph. Samuel B. Morse developed a code of "dots' and "dashes" to send messages.
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The Central Pacific and Union Pacific railroads met in Promontory, Utah marking the completion of the second railroad to connect the Atlantic to the Pacific ocean.
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