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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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Human kidneys will clean about 1 million gallons of blood in an average lifetime.

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Asthma cases in Americans are about 75% higher today than they were in 1980.

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The average adult has about 21 square feet of skin.

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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

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