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The dry down period is part of the perfume process. Find out what dry down is and how it affects the way we smell.

What does a harmonic balancer do? Learn how harmonic balancers solve the problem of crankshaft vibrations at HowStuffWorks.

When you have an itch, what is happening under your skin? And, why does scratching make it go away?

A brownfield are abandoned pieces of land that may be contaminated. Find out more about what a brownfield can do to a community.

What is the future of geothermal energy? Learn more about the future of geothermal energy in this article.

What is the difference between a hardwood and a softwood? How hard does a tree have to be to be considered hardwood?

What is electronic news gathering? Read about electronic news gathering and modern journalism at HowStuffWorks.

What are the different chapters of bankruptcy and how do they work? Learn the differences between the four different bankruptcy chapters.

What's the obstruction rule in baseball? Learn about the obstruction rule in baseball in this article from HowStuffWorks.

What are some common food allergies in infants? Learn what some common food allergies in kids are in this article.

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