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Check your heart rhythm with the ECG app
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A Brief History of Timekeeping nil-product Check your heart rhythm withOur modern lives are ruled by clocks and watches, smartphone apps and calendar programs. While our gadgets may be new, however, the drive to measure and mastertime is anything but and in A Brief History of Timekeeping, Chad Orzel traces the path from Stonehenge to your smartphone. Predating written language and marching on through human history, the desire for ever better timekeeping has spurred technological innovation and sparked theories that
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