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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

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Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

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When taking monoamine oxidase inhibitors, people should avoid a variety of foods, which include alcoholic beverages, bean curd, broad (fava) bean pods, cheese, fish, ginseng, protein extracts, meat, sauerkraut, shrimp paste, soups, and yeast.

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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.

Pulmonary function test: spirometry. (a) Normal respiratory volumes, as measured during spirometry. Pulmonary function test: spirometry. (a) Normal respiratory volumes, as measured during spirometry.
This engraving by William Russell Birch shows Congress Hall (left), which was occupied by Congress f This engraving by William Russell Birch shows Congress Hall (left), which was occupied by Congress f
The percentage of women who have cohabited by the age of 45 for 17 countries shows that the ... The percentage of women who have cohabited by the age of 45 for 17 countries shows that the ...
CT scan of the head shows a massive bleed with a midline shift. CT scan of the head shows a massive bleed with a midline shift.
The Means and Extremes of a Proportion The Means and Extremes of a Proportion
Albedo Chart Albedo Chart
Video: Introduction to Pre-eclampsia

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