Units (@UnitFact) header
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Units of measurement, constants, dimensional analysis, etc. From @JohnDCook

Joined April 2014
.@UnitFact will be ending June 14. If you've enjoyed following @UnitFact, I suggest you follow @ScienceTip instead.
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.@UnitFact will be ending June 14. If you've enjoyed following @UnitFact, I suggest you follow @ScienceTip instead.
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.@UnitFact will be winding down soon. If you've enjoyed following @UnitFact, I suggest you follow @ScienceTip instead.
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Historical units of British currency johndcook.com/blog/2009/12/2…
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Units that are now exact by definition
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