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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 stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.