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Did you know?
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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There are more bacteria in your mouth than there are people in the world.
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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
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Blood is approximately twice as thick as water because of the cells and other components found in it.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.