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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.
About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.
Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
On average, the stomach produces 2 L of hydrochloric acid per day.