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How Does a Breathalyzer Work?
electronics.howstuffworks.com/gadgets/automotive/breathalyzer.htm
A roadside sobriety test of touching one's nose or walking a straight line cannot rule out a high blood alcohol concentration. That's why the Breathalyzer is such a game-changer. But how does a Breathalyzer work? Read on to find out!
Can You Pass This College Vocabulary Quiz?
play.howstuffworks.com/quiz/can-you-pass-this-vocabulary-quiz
Are you an avid reader? Do you have a dictionary on-hand at all time? Could you go head-to-head with a college grad in Scrabble or Taboo? If you answered yes, you've probably acquired quite an impressive stock of words. Do you think your internal dictionary is at a college level, or has time stolen away some of your memory? Take the quiz to see if your vocabulary truly impresses your friends, or just befuddles them!
How to Troubleshoot a Hot Water and Steam Distribution System
Hot water and steam systems work similarly, and are still used in existing homes. Some routine maintenance is required to keep them working properly. Learn how to troubleshoot a hot water and steam system.
How Diabetes Works
health.howstuffworks.com/diseases-conditions/diabetes/diabetes.htm
In the U.S. alone, 20.8 million people have diabetes -- and about a third don't even know it. Find out some information you just may need.
The Dangers of Low Cholesterol
The dangers of low cholesterol is good information to know for your overall health. Learn more about the dangers of low cholesterol from Discovery Health.
How to Check Your Transmission Fluid
auto.howstuffworks.com/how-to-check-transmission-fluid.htm
In addition to getting regular oil changes and replacing tires, it's important to know how to check transmission fluid for your car.
What does pH-Balanced mean?
health.howstuffworks.com/skin-care/cleansing/products/ph-balanced.htm
What does pH-Balanced mean? Learn about what pH-Balanced means at HowStuffWorks.
How Menstruation Works
health.howstuffworks.com/wellness/women/general/menstruation.htm
Menstruation the female reproductive cycle that makes eggs available for fertilization. Learn about menstruation and menstrual cycles at HowStuffWorks.
Electrolytes 101
health.howstuffworks.com/wellness/diet-fitness/information/electrolyte.htm
Electrolytes are formed by mineral salts and are dissolved by the fluids in our bodies. Read more about electrolytes and mineral salts.
Testosterone
health.howstuffworks.com/human-body/systems/endocrine/testosterone.htm
Testosterone is one of the most important, but commonly misrepresented hormones found in the body. Learn about the role of testosterone.