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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.
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There are more sensory neurons in the tongue than in any other part of the body.
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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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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.