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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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According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).
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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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Illicit drug use costs the United States approximately $181 billion every year.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.