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How Plasma Rockets Work

science.howstuffworks.com/plasma-rockets.htm

Imagine if we could get to Mars in 40 days instead of seven months! It could happen if we used plasma rockets, which travel at 34 miles per second. But how do we make this a reality?

How Floppy Disk Drives Work

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Floppy disk drives have been around since the birth of personal computing -- find out how they work!

How Is Helium Made?

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

10 Possible Solutions to Air Pollution

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Not only do cars produce a large portion of the world's pollution, but airplanes, boats, trucks, trains and buses also contribute to pollution. Is there one magic solution to pollution?

How Biometrics Works

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With the help of Q, James Bond can breeze through a security system that requires the villain's irises, voice and handprint. Biometrics isn't just for the movies. Real-life businesses and governments are using it. Check it out.

How Instant Film Works

science.howstuffworks.com/innovation/everyday-innovations/instant-film.htm

Before digital cameras, you needed instant film to get instant pictures. With instant-film photography, you can watch the image slowly come together in a matter of minutes. While it seems like magic, the process relies on elements of science. Find ou

What Is a White Hole? Does the Cosmic Phenomenon Exist?

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Black holes have long held the spotlight as celestial objects from which nothing, not even light, can escape. However, theoretical physicists propose a less understood but equally fascinating counterpart: the white hole.

How Fuel Cells Work

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A hydrogen fuel cell is an electrochemical energy conversion device. Learn why governments are pouring money into fuel cell research.

How does a security passcard work?

computer.howstuffworks.com/question662.htm

Security passcards are often used to gain entry into areas and buildings with restricted access. Find out what data is kept an encoded security passcard and how they work.

Butterflies Inspire Creation of Lightest Paint in the World

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As the result of a happy accident, scientists have created a sustainable paint that's lighter, longer-lasting and more cooling than traditional paint.

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