How many centimeters? Measurement introduction The metric system is a system of measurement used in many countries around the world. It is based on...

Inch definition An inch is traditionally considered to be the smallest overall unit of length in the imperial system. Measurements smaller than an inch...

How measurement was done in the past? The usefulness and usability of measures was determined both in the past and today by the practice...

Have you ever wondered how long 72 hours really is? This seemingly simple question has many facets to it, and the answer might depend...