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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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Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

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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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During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.

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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.

Foliage height diversity and bird species diversity (data from MacArthur and MacArthur 1961). Foliage height diversity and bird species diversity (data from MacArthur and MacArthur 1961).
Roots of the keystone species hypothesis: does a higher proportion of predators in diverse communiti Roots of the keystone species hypothesis: does a higher proportion of predators in diverse communiti
The Eastern Banjo Frog is a common frog species across eastern Australia. The Eastern Banjo Frog is a common frog species across eastern Australia.
Human body organs Human body organs
Share of Human Capital in Wages in Advanced Countries Share of Human Capital in Wages in Advanced Countries
The production of a new allopolyploid species The production of a new allopolyploid species
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