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Diamonds are rare? Not really. They became an engagement ring staple, thanks to a clever, if deceptive, public relations campaign.

Some jobs are so critical to everyday life that they've never gone out of style. Learn about 10 job titles that have been around for 2,000 years.

Proper care of your cat can keep your feline friend happy and healthy. Learn how to care for a cat and how to find the right veterinarian.

Marilyn Monroe starred in the film 'How to Marry a Millionaire' along with such stars as Betty Grable and Lauren Bacall. Learn more about her role.

In this Elvis Presley biography you can follow the King from his birth to his untimely death. Learn about the life and times of Elvis Presley.

Was there really a saint named "Valentine"? And why all the flowers and chocolate? Learn all about the origins and symbols of Valentine's Day.

A digital converter box will soon be required for TVs that aren't connected to digital cable. Find out if you'll need a digital converter box.

Space Camp is for kids and adults to learn about flight, engineering, astronomy and robotics. Learn about Space Camp and its programs and simulators.

You're probably standing in one right now, but do you know what a watershed is and how watersheds work? Learn how watersheds work here.

Are you curious about how cinematographers work? Find out how cinematographers work at HowStuffWorks.

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