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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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Illicit drug use costs the United States approximately $181 billion every year.
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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.
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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.