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Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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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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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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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.