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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
Cyanide works by making the human body unable to use oxygen.
The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.