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In 1844, Charles Goodyear obtained the first patent for a rubber condom.

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The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.

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Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

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Everyone has one nostril that is larger than the other.

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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

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