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What Is CNC Machining?

science.howstuffworks.com/cnc-machining.htm

Nearly everything you use in your life was touched by a CNC machine tool. Don't know what a CNC machine tool is? We'll explain.

Can a penny dropped off a building kill you?

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Walking down a city sidewalk, you protect your valuables and weave through crowds. Should you also beware of falling pennies?

The North American Geography Quiz

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North America encompasses huge expanses of water and land. What do you know about this area's people, geology and climate? Take this quiz to find out.

How Blackouts Work

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Blackouts are explained in this article. Learn about blackouts.

What is organic certification?

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Organic foods and other products are popping up everywhere.

How can low-income students attend Ivy League colleges for free?

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Ivy League colleges are not off limits to people that don't have a lot of money. Find out how low-income students can attend Ivy League colleges.

How Icynene Works

home.howstuffworks.com/home-improvement/heating-and-cooling/icynene.htm

Icynene is proposed as a greener alternative to other types of insulation. Learn about Icynene and see how it compares to traditional insulation.

How Missile Defense Systems Will Work

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What once was "Star Wars" under Reagan is now National Missile Defense under Bush. Learn more about the technology behind the system.

9 Countries With Blue-Yellow-Red Flags

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A nation chooses a flag design very purposefully. These countries with blue, yellow and/or red flags picked those colors for specific reasons.

How Air Traffic Control Works

science.howstuffworks.com/transport/flight/modern/air-traffic-control.htm

There are about 5,000 planes in U.S. airspace every hour. How do these aircraft keep from colliding with each other? Learn about the intricate system that guides a plane from takeoff to landing.

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