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How AIDS Works

science.howstuffworks.com/life/cellular-microscopic/aids.htm

HIV continues to be a major global public health issue, having claimed more than 35 million lives so far.

How to Fake a GPS Location on Your Phone

electronics.howstuffworks.com/cell-phone-apps/fake-gps-phone.htm

Want to throw someone off your tracks? A GPS spoofing app is the best way to do it. Here's how it works for both android and iPhone.

What is the difference between DVD-audio and CDs?

electronics.howstuffworks.com/question344.htm

What is the difference between DVD-audio and CDs? It all has to do with their sampling rate.

How NORAD Works

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NORAD is a military operation that is jointly run by the United States and Canada. Learn about NORAD and the unique location for the NORAD headquarters.

How Hackers Work

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Hackers with bad intentions make up a surprisingly small percentage of the hacker community. Learn more about hackers and how hackers help the computer world.

Organ Function Quiz

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Whether you're an amateur anatomy buff or a full-fledged medical professional, we challenge you to test your knowledge with this organ function quiz ... if you have the guts.

How Caterpillar Backhoe Loaders Work

science.howstuffworks.com/transport/engines-equipment/backhoe-loader.htm

You see backhoe-loaders on nearly every construction site around town. Learn how these amazing machines work and what they are able to do.

How was the construction of the World Trade Center unique?

science.howstuffworks.com/engineering/structural/world-trade-center-construction-unique.htm

The World Trade Center employed several new approaches to skyscraper construction. From slurry walls to sky lobbies to "tube within a tube" design features, what made this project distinctive from an architectural engineering standpoint?

Body Mass Index

health.howstuffworks.com/wellness/diet-fitness/weight-loss/bmi.htm

The number on the scale alone can't tell you whether you're at a healthy weight. Because height is also a factor, scientists came up with a mathematical formula called Body Mass Index (BMI). Learn how to calculate your BMI.

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