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Screws
home.howstuffworks.com/screws.htm
Screws have a few benefits over other fasteners -- they provide lots of strength and can be easily removed. Find out about different types of screws.
Colombia, Not Finland, May Be the Happiest Country in the World
The Scandinavian countries tend to come out on top in the World Happiness Report. But the report doesn't actually ask participants if they're happy. When that question is included, the country rankings are quite different.
What Does 'BPA Free' Mean and Why Does It Matter?
science.howstuffworks.com/environmental/green-science/bpa.htm
The chemical BPA (bisphenol-a) often found in consumer goods, may be linked to human health problems. Learn more about BPA in polycarbonate plastics.
Chevrolet Monte Carlo
auto.howstuffworks.com/chevrolet-monte-carlo.htm
The Chevrolet Monte Carlo debuted in 1970; it was built as a personal-luxury car, but grew into much more. Follow the Monte Carlo from 1970 to 1996.
How Eco-anxiety Works
science.howstuffworks.com/environmental/green-science/eco-anxiety.htm
Eco-anxiety is a chronic concern over environmental issues. Learn about eco-anxiety a treatments for eco-anxiety.
What's my target heart rate?
health.howstuffworks.com/diseases-conditions/cardiovascular/cholesterol/target-heart-rate.htm
Target heart rate is a desired rate of heart rate. Learn more about target heart rate at Discovery Health.
Parasitic Wasp Larvae Eat Host From Inside Out
animals.howstuffworks.com/insects/parasitic-wasp-larvae-eat-host-from-inside-out.htm
These parasitic wasps eat their hosts from the inside. HowStuffWorks takes a look.
What Is the Largest City in the World by Population?
people.howstuffworks.com/culture-traditions/cultural-traditions/largest-cities-in-world.htm
Of the 8 billion people now inhabiting this planet, almost 60 percent live in urban environments in some pretty densely packed cities. Here are the top 10 megacities in the world.
How Vitamin B2 Works
health.howstuffworks.com/wellness/food-nutrition/vitamin-supplements/vitamin-b-2.htm
Learn about vitamin B2, or riboflavin, a coenzyme that helps to metabolize carbohydrates, fats, and proteins in order to provide the body with energy.
What the Heck Happened to Rollerblading?
entertainment.howstuffworks.com/what-the-heck-happened-rollerblading.htm
Rollerblading may be the latest fad to come around again. HowStuffWorks Now looks at the rise and fall of a '90s institution.