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Salt in Antiquity
While salt is cheap today, it used to be worth its weight in gold. Historians believe that Roman soldiers were once paid with salt. In fact, the word 'salary' comes from the Latin word 'salarium,' or payment in salt. During the late Roman Empire, salt was carried across 400 miles of the Sahara desert by caravans of as many as 40,000 camels. It was that important to humanity!