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

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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

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Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

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