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What causes underarm darkening?
health.howstuffworks.com/skin-care/underarm-care/problems/underarm-darkening.htm
What causes underarm darkening? Read about the causes of dark underarms and how to get rid of dark underarm skin.
How Plasma Displays Work
electronics.howstuffworks.com/plasma-display.htm
Flat-panel plasma displays are quickly surpassing bulky CRTs in terms of sales. Learn about plasma technology.
How Calories Work
health.howstuffworks.com/wellness/diet-fitness/weight-loss/calorie.htm
Calories -- people are constantly counting them and cutting them. At any given time, millions of people are trying to slim down. Learn all about calories and exactly how (and why) they affect your weight.
How Cell Phones Work
electronics.howstuffworks.com/cell-phone.htm
Learn about cell phones, check out our cell phones buying guide, read cell phone reviews and compare prices and features on cell phone accessories.
Tourette Syndrome Overview
health.howstuffworks.com/mental-health/neurological-conditions/tourette.htm
Tourette syndrome is a fairly common syndrome that affects as many as one in 100 people. Learn about Tourette syndrome and treatments for Tourette syndrome.
Can You Pass This Basic Middle School Science Quiz?
play.howstuffworks.com/quiz/can-you-pass-this-basic-middle-school-science-quiz-snap
Middle school science is no joke; they start giving you the super-hard science then. Why not see how well you can do on a middle school science test? Grab your pencil and take the quiz!
How Your Immune System Works
health.howstuffworks.com/human-body/systems/immune/immune-system.htm
Inside your body there is a mechanism designed to defend you from millions of bacteria, microbes, viruses, toxins and parasites that want to invade your body. Find out how the human immune system works.
What if I accidentally ended up locked in a walk-in freezer?
science.howstuffworks.com/innovation/science-questions/locked-in-freezer.htm
Being locked in a freezer like the ones found in restaurants could lead to hypothermia if you're in there too long. Learn about getting locked in a freezer.
How Does a Seismograph Work?
science.howstuffworks.com/environmental/earth/geophysics/question142.htm
A seismograph can accurately measure the movement of the Earth during a quake. How does a seismograph work, though, and what is the Richter scale that is associated with earthquakes? Learn the answers to these questions in this article.
Melasma Overview
health.howstuffworks.com/skin-care/problems/medical/melasma.htm
Melasma is a skin condition that darkens the skin. Learn more about how melasma works at HowStuffWorks.