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High-Tech Channel Hitachi High-Tech GLOBAL

Even used to calculate the circumference of the world! An ancient distance unit

Base data: length.
Unit of length dating back to Ancient Greece. Length of about 185 m.

Origin of the word, “stadium”

It takes about 2 minutes for the sun to move the sum of its diameter. During that time, people can walk about 185 m. This measurement was determined in ancient Greece, and the unit was called 1 stadion. It was useful apparently for travel. This length was also adopted to measure the race tracks in ancient stadia, hence the origin of the word, “stadium”.