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Why would circumcision decrease a man's risk of contracting AIDS?
science.howstuffworks.com/environmental/life/cellular-microscopic/circum-aids.htm
The results of three recent studies show that an uncircumcised man is twice as likely to contract AIDS from an infected woman as is a circumcised one.
How Deep Impact Works
science.howstuffworks.com/dictionary/astronomy-terms/deep-impact.htm
How do scientists find details about the early days of our solar system? One way is to investigate comets. Find out how the Deep Impact spacecraft fired an impactor into Comet Tempel 1 to get some answers.
Who's Your Daddy? The History of Paternity Testing
science.howstuffworks.com/life/genetic/history-paternity-testing.htm
Before the widespread use of DNA, establishing the paternity of a child was a tricky business. Ever heard of the oscillophore?
Foot Injuries
health.howstuffworks.com/diseases-conditions/musculoskeletal/foot-injuries.htm
Feet are hard-working body parts, so it's no wonder they get injured on occasion. Learn how to ease, or even avoid, the pain of foot injuries here.
Is a little stress good for you?
health.howstuffworks.com/wellness/stress-management/good-stress.htm
Is there such a thing as good stress? Learn about different types of stress and how you can benefit from good stress and hopefully avoid the bad.
Can You Pass This High School General Science Quiz?
play.howstuffworks.com/quiz/can-you-pass-this-high-school-general-science-quiz
Although not always a favorite subject, most people take at least one general science class in high school. Take this quiz to find out how much you remember.
Why do men smell different from women?
health.howstuffworks.com/wellness/men/sweating-odor/men-smell-different-from-women.htm
Why do men smell different from women? Visit Discovery Health to learn why men smell different from women.
Can You Guess the Car From a Photo of the Interior?
play.howstuffworks.com/quiz/can-you-guess-the-car-a-photo-the-interior
A gear shift, a window winder, a dashboard gauge ... all you will have to identify a host of iconic vehicles from decades of motoring! No body curves here, just an interior image to make your selection!
How Vitaminwater Works
science.howstuffworks.com/innovation/edible-innovations/vitaminwater.htm
Vitaminwater is a new product from Glaceau that combines distilled water with vitamins, herbs and flavors. Learn about Glaceau's Vitaminwater product.
How RFID Works
electronics.howstuffworks.com/gadgets/high-tech-gadgets/rfid.htm
RFID is a tracking system that uses intelligent bar codes to track items in a store. Learn more about RFID and find out how smart labels work.