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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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It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.