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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

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The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.

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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

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