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A
Walk through Time |
History
of timekeeping from ancient to modern times.
(at NIST) |
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Calendars
through the Ages |
Systems
of counting the days, months, and years.
(at webexhibits.org) |
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Daylight
Saving Time |
When
and why do we change our clocks?
(at webexhibits.org) |
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ClockWorks |
Illustrated
mechanisms of many historical clocks.
(at Britannica) |
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It's
About Time |
Advances
in timekeeping accuracy and atomic clocks.
(at University of Wisconsin) |
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The
Quartz Watch |
What's
inside your wristwatch? See stories and timeline.
(at Smithsonian) |