In ancient times, the Egyptians and the Babylonians used their body parts as measurement tools. A very old unit of measurement is the cubit: It is the length from the elbow to the tip of the middle finger. Smaller length were specified by the length of a finger or the span of the palm-this is the stretched hand from the tip of the thumb to that of the little finger. The foot was also used to measure distances-just as the step and the double step. The Romans also used these measures. A Roman mile had a thousand double steps, and each double step measured five Roman feet.
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