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How does the sun affect healing scars? Visit HowStuffWorks to find out how the sun affects healing scars.

Hydrogen peroxide is something that is used to clean cuts. Have you ever wondered why it foams when placed on a cut? Learn about hydrogen peroxide.

What exactly is pastrami? I've been eating it since I was a kid, but I've never known what it is. Find out the answers to these questions here.

A nebulizer is a medication used to treat asthma. Learn more about a nebulizer at Discovery Health.

Impact wrenches provide extra pressure through either an electric or air motor. Learn how an impact wrench works from this article.

Early 20th-century railroads saw major improvements in safety and comfort, as well as new regulations. Learn more about railroads in the early 1900s.

Smart homes connect all the devices and appliances in your home so they can talk to each other. See more about smart homes and their technology.

Recycled glass jar crafts can be a lot of fun to make. Visit HowStuffWorks to learn all about making recycled glass jar crafts.

Stackable cars could mimic the design of stacked shopping carts. Learn how stackable cars compact themselves and how the vehicles actually function.

Science projects for kids: the moon give kids lunar adventures. Learn more about the phases of the moon, how the moon moves and how it looks.

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