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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).