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+22 +1
Are the Constants of Physics Constant?
So far, they seem to be—but nobody really understands why. By Venkat Srinivasan.
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+30 +1
New, Ultra-Precise Measure Could Help Redefine the Kilogram
A new measurement of Avogadro's number could pave the way for a measure of the kilogram based on fundamental constants of nature.
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+13 +1
Why Time Will Stop For a Leap Second
With the advent of ever-more-accurate clocks, keeping good time is becoming surprisingly complicated.
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+20 +1
Clockmaker John Harrison vindicated 250 years after ‘absurd’ claims
The pendulum clock of Longitude hero John Harrison is tested and declared a masterpiece