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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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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.