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Have You Noticed That Your Car Makes Noise in Reverse?
auto.howstuffworks.com/question522.htm
Manual transmissions use mostly helical gears, but reverse is a special situation that requires a different type of gear -- a spur gear. Learn why a spur gear makes a loud whirring noise when the car's in reverse.
How to Wash Silk Without Ruining the Fabric
Silk is a delicate fabric that requires extra care to keep it looking luxurious and feeling soft. Whether you have silk clothing or other silk items, it's important to properly wash them to prevent damage.
How to Remove Stains and Discoloration From Wooden Furniture
Wooden furniture can be spoiled by small damage to the surface. Some stains are easily removed, while more damaging spots may require refinishing. Learn simple methods to repair small stains quickly and effectively.
How Military Robots Work
science.howstuffworks.com/military-robot.htm
Soldiers face danger every day -- detecting landmines, deactivating unexploded bombs and scoping out hostile buildings are tasks that don't always require a human presence. That's where military robots come in.
How Biometrics Works
science.howstuffworks.com/biometrics.htm
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 to Maintain an Air Conditioner
home.howstuffworks.com/how-to-maintain-an-air-conditioner.htm
Central air and window conditioners require routine maintenance to keep them operating at peak efficiency. It's important to know how a system's main parts function. Learn to troubleshoot a central air and room conditioner system.
The Ultimate Survival Skills Quiz
play.howstuffworks.com/quiz/survival-skills-quiz
Being stranded in the wilderness may make for a good movie, but in reality, it's a harrowing experience. Staying alive may require you to build a shelter, start a fire and even eat bugs for nourishment. Can you survive this quiz?
Are You Ready to Backpack Europe?
play.howstuffworks.com/quiz/are-you-ready-to-backpack-europe
Ah, Europe! The sights, the culture, the glamour ... It's certainly the birthplace of Western civilization. However, backpacking your way across Europe is a feat that requires some savvy planning. Are you ready for it? Take this quiz and find out!
Can You Pass This Basic True/False SAT Word Quiz?
play.howstuffworks.com/quiz/can-you-pass-this-basic-truefalse-sat-word-quiz
Were you a word guru on the verbal portion of the SAT? Do you frequently amaze your friends with your extensive vocabulary? If so, then you should be able to ace this SAT word quiz. A No. 2 pencil is not required!
The Murder Capital of the U.S. Is in the Deep South
people.howstuffworks.com/murder-capital-of-the-us.htm
The title "murder capital of the U.S." often sparks intense debate, but identifying which city holds this grim distinction requires more than just a glance at murder rates. Factors such as population density add critical context to the narrative.