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How CAPTCHA Works
computer.howstuffworks.com/captcha.htm
CAPTCHA is a security test given to prevent computers from filling out forms on the Internet. Learn more about How CAPTCHA Works.
How to Prevent Sexually Transmitted Diseases
health.howstuffworks.com/wellness/preventive-care/how-to-prevent-sexually-transmitted-diseases.htm
Preventing sexually transmitted diseases is simply a matter of being prepared and using your head. Learn how to treat and prevent various STDs.
How Sinkholes Work
science.howstuffworks.com/nature/natural-disasters/sinkhole.htm
Sinkholes are much more than holes in the ground. Learn how sinkholes can cause the Earth to swallow up you, your home and your car.
10 Historically Inaccurate Movies
history.howstuffworks.com/history-vs-myth/10-historically-inaccurate-movies.htm
Historically inaccurate movies are laughable -- until you consider that someone takes them for the truth. Read about these historically inaccurate movies.
How Suicide Bombers Work
science.howstuffworks.com/suicide-bomber.htm
Suicide bombers use a unique form of terrorism in order to advance their message. Learn about suicide bombers.
How Super Truck Racing Works
auto.howstuffworks.com/auto-racing/motorsports/super-truck-racing.htm
Super truck racing is a popular sport in Europe, though it hasn't caught on as well in the U.S. Read all about super truck racing in this article.
1930-1939 Ford Trucks
auto.howstuffworks.com/1930-1939-ford-trucks.htm
Ford's depression battle plan was simple: Build better cars and trucks. Explore 1930s Ford trucks -- and find great photos -- in this article.
How Friendster Works
computer.howstuffworks.com/internet/social-networking/networks/friendster.htm
Friendster was one of the Web sites to bring social networking into mass culture. See how Friendster connects you to people and other Friendsters.
10 Everyday Car Technologies That Came From Racing
auto.howstuffworks.com/under-the-hood/trends-innovations/top-10-car-tech-from-racing.htm
Do you think you know 10 everyday car technologies that came from racing? Read this article to learn 10 everyday car technologies that came from racing.
How Blood Works
health.howstuffworks.com/human-body/systems/circulatory/blood.htm
Blood is the most commonly tested part of the body, and it is truly the river of life. Learn about red and white blood cells, lymphocytes, blood tests, blood types and blood donation.