A person’s height is a fairly constrained measurement. Length, more broadly, can be vary on many different scales. And space is big.1 My commute is 50km, but the distance from the Earth to the Sun is approximately 150 million kilometers and the distance from the Earth to the Andromeda is $2.4 \times 10^{19}$ kilometers. That’s a lot. And that is something we should measure on a logarithmic scale.