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Ever wonder how to volunteer for the Salvation Army? Visit HowStuffWorks to learn how to volunteer for the Salvation Army and more.

The Doll's Theater of Carlsbad Caverns looks otherworldly and took ages to form. What other incredible sights await us below ground?

Soil lamps are discussed in this article from HowStuffWorks. Learn about soil lamps.

The 'Last Supper' painting by Da Vinci has generated many hidden-meaning theories. Could these theories be real? Learn more about the 'Last Supper'.

Cord entered the 1920s with a car that was a success -- the Cord Auburn -- and one that should have been -- the Cord L-29. Read more in this article.

Formica is a surface material commonly used in home improvement projects. Learn more about formica at HowStuffWorks.

How are sleep and heart disease related? Researchers have identified many ways sleep affects heart health. Read about sleep and heart disease here.

Can you really take poison as medicine? Learn about both ancient and cutting-edge ways that poison acts as medicine.

The causes of rigor mortis stem from the way muscles move. Learn about the causes of rigor mortis and see how chemistry affects postmortem stiffness.

"You see it every day, but what, exactly, is art? Learn about art and explore the huge collection of art now becoming available on the Web!"

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