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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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Aspirin may benefit 11 different cancers, including those of the colon, pancreas, lungs, prostate, breasts, and leukemia.
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There are approximately 3 million unintended pregnancies in the United States each year.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.