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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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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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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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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.