It's mole day! At 6:02, tip your hat to Avogadro's constant
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721
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October 28, 2021
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The weight of a kilogram changed overnight; the length of a second may be next
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34
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1524
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May 25, 2019
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Technically, the US has been using the metric system since 1893
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80
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5611
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August 25, 2013
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TOM THE DANCING BUG: The Truth About Numbers… Bible Math!
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47
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5095
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February 17, 2014
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A math teacher explains "new math"
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124
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18301
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March 15, 2014
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