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Do you know how to become a postal police officer? Find out how to become a postal police officer in this article from HowStuffWorks.

You may know about them, but have you tried them? Stuff Mom Never Told You explores why menstrual cups aren't that popular. Yet.

Natal teeth are a bit unusual, but nothing to worry about. HowStuffWorks looks at the phenomenon.

The caramel coloring prevalent in sodas may cause hypertension more than the caffeine. Learn about the possible hazards of caramel coloring.

The benefits of walking include a reduced risk of disease, improved sleep, less stress, increased energy, and more. Learn more about these benefits.

Casinos bring in billions of dollars in revenue each year. Learn about casinos and find out how security keeps casinos safe and fair.

The movie 21 is about math prodigies from MIT who used card counting to win millions in blackjack. Learn more about 21.

Car testing is done by automakers to spot and fix design flaws before they go into mass production. Learn how car testing works in this article.

Microlending is a new type of lending that has entered the scene. Learn how microlending works and what risks are involved.

Head lice can be a very irritating condition. Visit HowStuffWorks to learn all about head lice.

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