The universe would be here even if people weren't, but the system we use to take its measure is a thing made by humans. In fact, SI units used to be based on actual, real-life physical artifacts.

The SI system includes a hierarchy of units to measure the amount of substance, accommodating a wide range of scales from kilomoles (kmol), which represent thousands of moles, down to picomoles (pmol) ...

It is commonly used in fields such as nanotechnology, crystallography, and spectroscopy to measure atomic and molecular structures. While the angstrom is still widely used in some fields, the ...

Just like in metric measures, the unit of measure you use depends on the size of the item. Here are some imperial measures for length you may be familiar with: You can measure the height of a ...