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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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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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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.
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During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.
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There are more nerve cells in one human brain than there are stars in the Milky Way.