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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

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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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Vaccines prevent between 2.5 and 4 million deaths every year.

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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

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