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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In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.
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According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.
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The horizontal fraction bar was introduced by the Arabs.
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One page of color vision chart.
How to choose the right payment plan with changing conditions (Question 1)