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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.
How does glow-in-the-dark stuff work?
science.howstuffworks.com/innovation/science-questions/question388.htm
You can find glow-in-the-dark item everywhere these days. Have you ever wondered how these items produce their light? Find out the answer to that question in this article.
Calculating the Mass of Earth: How Much Does Earth Weigh?
science.howstuffworks.com/environmental/earth/geophysics/planet-earth-weigh.htm
The Earth is incredibly heavy. How do scientists determine the weight of the Earth?
Why Does Having Too Many Options Make It Harder to Choose?
science.howstuffworks.com/life/inside-the-mind/human-brain/choose-options.htm
To choose between options in the decision-making progress can be overwhelming. See why it is hard to choose options when there are many choices.
Does human growth hormone slow the aging process?
health.howstuffworks.com/wellness/aging/anti-aging-tips/hgh-aging.htm
HGH aging prevention is a hot topic. Could this hormone reduce wrinkles, increase muscle mass and more? Take a look at HGH aging prevention.
What is a virus, and how does it become a danger to human life?
science.howstuffworks.com/life/cellular-microscopic/virus-danger.htm
A virus can be dangerous. Learn about virus dangers and what exactly is a virus. Get informed about virus dangers at HowStuffWorks.
How Long Does Laser Hair Removal Last?
health.howstuffworks.com/wellness/spa-health/laser-hair-removal-last.htm
Whether you've been tweezing, waxing or shaving those pesky problem hairs, you're probably tired of losing the follicle feud. But is permanent hair removal really permanent?
Does singing make you happy?
science.howstuffworks.com/life/inside-the-mind/emotions/singing-happy.htm
Can singing make you happy? Take a look at what happens to your body when you sing and find out if singing makes people happy.
What does a stand-in do?
entertainment.howstuffworks.com/stand-in.htm
A movie star isn't going to spend hours on a set so the crew can adjust the lighting -- but someone's has to. Learn what stand-ins do at HowStuffWorks.
How Does a Counterfeit Detector Pen Work?
money.howstuffworks.com/question212.htm
Counterfeit detector pens use special chemicals to spot a fake bill. How do they do it?