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Your search for "once" returned 9,809 results
What is OxyContin?
health.howstuffworks.com/medicine/medication/question706.htm
I keep hearing about some drug called "OxyContin" in the news. What is it? Why all the fuss?
How do sunless-tanning products work?
health.howstuffworks.com/skin-care/beauty/sun-care/question639.htm
How do sunless-tanning products work? Which is the most effective: self-tanning lotions or tanning pills?
When are colds and the flu the most contagious?
health.howstuffworks.com/diseases-conditions/cold-flu/contagious.htm
Many of us understand that we're most contagious before we start feeling sick. Find out when colds and the flu are most easily spread.
How Long Do Helium Balloons Last?
science.howstuffworks.com/question10.htm
Scenario: A helium balloon is up against the ceiling one day, and the next day it's on the floor. Does the balloon fall because the helium leaks out, or because the helium molecules slow down due to decreased pressure?
What Came First, the Chicken or the Egg?
science.howstuffworks.com/life/genetic/question85.htm
It's a chicken-or-egg situation: What came first? Perplexed people need wonder no longer, as we've sussed out the answer to this ancient riddle.
How do store coupons work?
money.howstuffworks.com/personal-finance/budgeting/question426.htm
How do store coupons work? How does the store get its money back?
Aromatherapy: Clove
health.howstuffworks.com/wellness/natural-medicine/aromatherapy/aromatherapy-clove.htm
Clove can be used in aromatherapy preparations to soothe sore muscles or to fight infections when applied to the skin. Learn about this essential oil.
Is it safe to shave my forearms?
health.howstuffworks.com/skin-care/beauty/hair-removal/safe-to-shave-forearms.htm
Is it safe to shave my forearms? Visit HowStuffWorks to learn if it is safe to shave your forearms.
How long does paint emit VOCs into the air?
home.howstuffworks.com/home-improvement/household-safety/paint-emit-vocs.htm
Volatile organic compounds (VOCs) can make you dizzy and give you a headache. How long will these gross gasses hang out after you're done painting?
Do Pool Pumps Have to Run All the Time?
home.howstuffworks.com/swimming-pool-pumps-run-all-the-time.htm
Nothing is better than chilling in a cool pool on a hot summer day. But how long does your pool pump need to run to keep the water sparkling clean?