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marthawells' article on world-building problems, specifically mentioning timekeeping, reminded me of something I'd seen a while back:
The First Atomic Clock Wristwatch
Not, mind you, a watch that adjusts itself from a radio signal transmitted from NIST. No, this is a fully self-contained cesium clock, worn on the wrist.
(While you're there, check out "Project GREAT", an interesting proof of the variability of time.)
marthawells' article on world-building problems, specifically mentioning timekeeping, reminded me of something I'd seen a while back:The First Atomic Clock Wristwatch
Not, mind you, a watch that adjusts itself from a radio signal transmitted from NIST. No, this is a fully self-contained cesium clock, worn on the wrist.
(While you're there, check out "Project GREAT", an interesting proof of the variability of time.)
