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Your heart beats over 36 million times a year.
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Cyanide works by making the human body unable to use oxygen.
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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.
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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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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.