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A fascinating and informative history of how we measure time. In typically clear and insightful prose, Dr. Asimov recounts the origins of our 24-hour day and Gregorian calendar, and shows how both are firmly rooted in the motions of the Earth in the heavens.
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Previews available in: English
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Science, Time, Time, juvenile literature, Clocks and watchesShowing 1 featured edition. View all 11 editions?
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