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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.
The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
Excessive alcohol use costs the country approximately $235 billion every year.