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Your heart beats over 36 million times a year.

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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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In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.

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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.

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Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

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