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How Iron and Steel Work

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The refining of iron ore is one of the most historically significant achievements of all time. Find out how iron gets turned into steel and what it's used for.

How Is Barometric Pressure Measured and Why?

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Weather forecasters can tell what the weather will be by reading the barometric pressure, but how does it work?

How Is Helium Made?

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Helium is the second lightest element on the Periodic Table. How is helium created?

How Is the National Guard Different from the U.S. Army?

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The National Guard serves many purposes and does many jobs for the United States. Learn what the National Guard is and how it differs from the Army.

How Isaac Newton Worked

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Isaac Newton is one of the most important contributors to the field of science. Learn about the life of Isaac Newton.

How Israel's Iron Dome Defense System Works

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Israel's Iron Dome defense system is capable of intercepting - and destroying - thousands of incoming rockets targeting civilian areas. Here's how the sophisticated system works.

How Japan's Nuclear Crisis Works

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Explosions, fires and dangerous radiation levels dominated the headlines after the March 11 earthquake and tsunami sparked a nuclear crisis in Japan. How did so many safety measures fail?

How Jerusalem Syndrome Works

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Jerusalem Syndrome is the result of becoming overwhelmed when visiting the city of Jerusalem. Find out how visiting Jerusalem can cause Jerusalem Syndrome.

How Jet Lag Works

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Jet lag can be a drain on any long-distance trip. Learn about what causes jet lag and the best ways to prevent and deal with jet lag at Discovery Health.

How Jet Packs Work

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Thanks to several technological advancements, are jet packs closer than ever to becoming a reality for the average person? Find out how jet packs work.