A 2,000-Year History of Alarm Clocks - Atlas Obscura

Yi Xing was a bit of an overachiever. A mathematician, engineer, Buddhist monk and astronomer, Xing was asked to improve calendars in China. He took it one

A 2,000-Year History of Alarm Clocks - Atlas Obscura

Alarm Clock History

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Clocks - Atlas Obscura

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A 2,000-Year History of Alarm Clocks - Atlas Obscura

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130 Weird but True Fun Facts To Amaze and Surprise Everyone

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