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10 Pink Gemstones That Charm Beyond Valentine's Day

science.howstuffworks.com/environmental/earth/geology/pink-gemstones.htm

Pink gemstones blend science and sparkle like few other minerals. Whether you're drawn to the feminine hue for its metaphysical properties or just its stunning aesthetic, there's a pink stone for every style and budget.

10 Types of Metal (and We Don't Mean the Music)

science.howstuffworks.com/types-of-metal.htm

Metals are everywhere—in the wires in your walls, the pans in your kitchen, and even in your blood. These types of metal are defined by their atomic structure, properties, and how they interact with other elements.

How Tunnels Work

science.howstuffworks.com/engineering/structural/tunnel.htm

Constructing a tunnel is one of the most complex challenges in the field of civil engineering. Learn about the basics behind tunnels.

Conquistadors, Gold and Charlemagne: How California Got Its Name

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Surfboards, huarache sandals and endless sunshine? Yes. But throw in some Conquistadors, a Spanish novel, Black Amazons and, of course, Charlemagne and - voilà - the name "California" is born.

Red Lips and Glamour: Secrets of the '50s Makeup Look

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Want the '50s makeup look? Learn how to get that '50s look in this article.

15 Largest Cities in Germany, Ranked by Population

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Germany, a country with a rich history, cutting-edge innovation and vibrant culture, is home to some of Europe's most dynamic cities. Each of the largest cities in Germany reflects the nation's blend of historical significance, modern development and regional uniqueness.

Why do TV shows premiere in the fall?

entertainment.howstuffworks.com/tv-shows-premiere-fall.htm

You know you can't wait until the season premiere of your favorite show. But have you ever wondered why the networks' new seasons start in the fall?

Do bats jam each other's sonar?

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Do bats jam another bat's sonar to throw them off track? Find out and learn about bat sonar at HowStuffWorks.

The Tri-State Tornado of 1925 Traveled Over 200 Miles

science.howstuffworks.com/nature/natural-disasters/tri-state-tornado.htm

On March 18, 1925, a massive and terrifying storm tore through the Midwest, becoming the Tri-State Tornado, the deadliest tornado in United States history.

10 Most Stressful Jobs in America

money.howstuffworks.com/10-most-stressful-jobs-in-america.htm

The most stressful jobs in America would drive most people nuts! Visit HowStuffWorks to see the 10 most stressful jobs in America.

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