The average office desk has 400 times more bacteria on it than a toilet.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.
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Excessive alcohol use costs the country approximately $235 billion every year.
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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
How to solve optimization problems in calculus (Question 7)