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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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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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A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.