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Where do butterflies get their striking colors?
animals.howstuffworks.com/insects/butterfly-colors.htm
Butterfly color is some of the most striking in nature. Learn how butterfly wings use ordinary color and structural color.
Ultrafiltration
health.howstuffworks.com/medicine/tests-treatment/ultrafiltration.htm
Ultrafiltration is a medical therapy used to remove excess salt and water from the bodies of patients who have a condition called fluid overload.
Does your credit card company want you to stay in debt?
money.howstuffworks.com/credit-card-debt.htm
Credit card debt grows through credit card fees and interest. Learn about credit card debt, credit card fees, late fees, annual fees and interest.
Kennedy-Johnson Era
history.howstuffworks.com/american-history/kennedy-johnson-era.htm
The Kennedy-Johnson era is an important aspect of modern American history. Learn more about the Kennedy-Johnson era at HowStuffWorks.
Typhoid Mary Was the Original Super Spreader
history.howstuffworks.com/historical-figures/typhoid-mary.htm
Mary Mallon was an Irish immigrant working as a cook in New York. She was a carrier of typhoid fever, but was she really a ruthless murderer?
How is carpet made?
home.howstuffworks.com/home-improvement/home-diy/flooring/how-is-carpet-made.htm
Have you ever wondered how carpet is made? Don't blame yourself if you don't know much about how carpet is made. Instead check out this article.
Does singing make you happy?
science.howstuffworks.com/life/inside-the-mind/emotions/singing-happy.htm
Can singing make you happy? Take a look at what happens to your body when you sing and find out if singing makes people happy.
How to Volunteer to Help Disabled Veterans
money.howstuffworks.com/economics/volunteer/opportunities/volunteer-to-help-disabled-veterans.htm
Would you like to volunteer to help disabled veterans? Visit HowStuffWorks to learn how to volunteer to help disabled veterans.
Who designed and built the first hybrid car?
auto.howstuffworks.com/fuel-efficiency/hybrid-technology/first-hybrid-car.htm
The first hybrid car was built much earlier than you might expect. Read up on the history of the first hybrid car models in this article.
Why aren't mountain goats really goats?
animals.howstuffworks.com/mammals/mountain-goats-really-goats.htm
Mountain goats may have woolly fur, cloven feet and horns, but they are quite different from true goats. Why call them mountain goats if they're not goats?