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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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Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

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Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

A juvenile blue whale with its mother A juvenile blue whale with its mother
The Allen Test: Pallor is initiated by compressing the radial and ulnar arteries with the fist clenc The Allen Test: Pallor is initiated by compressing the radial and ulnar arteries with the fist clenc
Signal transduction pathway initiated by trimeric TNF-alpha Signal transduction pathway initiated by trimeric TNF-alpha
Juvenile Offenders vs. Adult Offenders Juvenile Offenders vs. Adult Offenders
Mammalian male sex determination is initiated by the Y-linked SRY gene Mammalian male sex determination is initiated by the Y-linked SRY gene
Video: Blood Flow through the Human Heart

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