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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
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There are approximately 3 million unintended pregnancies in the United States each year.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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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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Everyone has one nostril that is larger than the other.