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Over the last half century, we’ve witnessed a blizzard of technological advances that have had a profound impact on our daily lives. But if we take the time to reflect for a moment, and look around at the commonplace devices we take for granted, we would discover that many of them had their origin during an era we don’t normally associate with innovation—the Middle Ages. In today’s episode, author and producer John W. Farrell takes us through a fascinating series of stories in his book, “The Clock and the Camshaft,” that describe how dozens of inventions that are part of virtually every aspect
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