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The horizontal fraction bar was introduced by the Arabs.
Atropine, along with scopolamine and hyoscyamine, is found in the Datura stramonium plant, which gives hallucinogenic effects and is also known as locoweed.
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.
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.