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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.
Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.
Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
The average adult has about 21 square feet of skin.
On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.