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The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.
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.
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
In 1864, the first barbiturate (barbituric acid) was synthesized.
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