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What are the symptoms of atrial fibrillation?
health.howstuffworks.com/diseases-conditions/cardiovascular/heart/how-atrial-fibrillation.htm
Atrial fibrillation is serious heart disease, but it's treatable if diagnosed early. Learn about EKGs, echocardiograms and other tests that detect AF symptoms.
How Do Artificial Flavors Work?
science.howstuffworks.com/question391.htm
Ever wondered exactly what they "artificial flavors" in your candy are, and why no specific ingredients are listed? Find out in this article.
Are You a Witch?
play.howstuffworks.com/quiz/are-you-a-witch
Would you fit right in with the Sanderson Sisters? Can you see yourself corralling flying monkeys with the Wicked Witch of the West? Or do you group all that magical malarkey in with so-called psychics and fortune-tellers? Take this quiz to find out whether it's time to find a coven to call home!
The Orchid Mantis Looks Like a Flower, 'Stings' Like a Bee
animals.howstuffworks.com/insects/orchid-mantis.htm
For decades scientists assumed these insects looked so much like orchids as a form of camouflage. But they were wrong. They look this way because they're deceptive predators.
What are natural gas hydrates?
science.howstuffworks.com/environmental/energy/natural-gas-hydrates.htm
What are natural gas hydrates? Learn what natural gas hydrates are in this article.
The Independent Variable vs. Dependent Variable in Research
science.howstuffworks.com/dictionary/independent-variable-vs-dependent-variable.htm
In any scientific research, there are typically two variables of interest: independent variables and dependent variables. In forming the backbone of scientific experiments, they help scientists understand relationships, predict outcomes and, in general, make sense of the factors that they're investigating.
What Are the Happiest Countries in the World?
people.howstuffworks.com/happiest-countries-in-the-world.htm
How do you measure the happiness of a country? Is it through the benefits afforded to citizens, the weather or the number of opportunities available? This is a question the World Happiness Report has tackled since 2012 to report on the happiest countries in the world.
Quick Tips: Can moisturizing reduce puffiness in your face?
There are many ways to reduce puffiness in your face, but first you have to determine the cause. Learn how moisturizer can reduce puffiness.
Why Does My Tire Pressure Light Come on When It's Cold?
It's freezing when you get into your car and you notice a light on your dashboard saying, 'check tire pressure.' You figure it's something to do with the cold, but must you fill up the tires fast?
Love at First Sight? A Study Says It's Probably Just Lust
health.howstuffworks.com/relationships/love/love-at-first-sight-study-says-just-lust.htm
Love or Lust? HowStuffWorks looks at a new study that determines whether love at first sight really exists.