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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

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The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.

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The horizontal fraction bar was introduced by the Arabs.

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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

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Everyone has one nostril that is larger than the other.

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