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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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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.
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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.