The Weight is Over, The Kilogram is Settled

Metrology is the study of weights. A scientist who studies metrology is called a metrologist. Metrologists, physicists, and other specialists, for decades, have been trying to tackle an issue concerning the weight of a kilogram. When you think about it for a second, this is a rather significant undertaking since the kilogram is the international standard by which all weights in the universe are measured.
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