The Two-Way How Pirates Of The Caribbean Hijacked America's Metric System This is the first expansion of the measurement system since 1991, according to the National Physical Laboratory.

Science News spoke with a metrologist about the metric system’s latest update, which will help scientists interpret exceedingly big and small numbers.

As revolution raged in the 1790s, French scientists replaced a chaotic system of weights and measures with an unified way to calibrate and calculate.

And while the United States hasn't fully adopted the metric system, the International System of Units (or SI, as it's officially known) has a role to play in our everyday lives.