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Plastic Numbers: Breaking Down Recycling Codes
science.howstuffworks.com/environmental/green-tech/sustainable/question217.htm
There are seven different numbers you might see on a plastic container. And each number has its own meaning.
15 Democratic Socialist Countries and Social Democracies
people.howstuffworks.com/democratic-socialist-countries.htm
What do you get when you mix a market economy with a strong commitment to equality, social justice, and democracy? You get social democracies and democratic socialist countries, and they come in a surprising variety.
How the U.S. Customs Service Works
people.howstuffworks.com/us-customs-service.htm
A fascinating article that tells you everything you need to know about U.S. customs laws, how they affect your travels and what you may bring back into the United States!
How Helicopters Work
science.howstuffworks.com/transport/flight/modern/helicopter.htm
Believe it or not, the marvel we know as the helicopter began as a Chinese top consisting of a shaft - a stick - adorned with feathers on one end.
How Vaccines Work
health.howstuffworks.com/wellness/preventive-care/vaccine.htm
A vaccine is, essentially, a cure for an illness or disease. Who came up with the idea for vaccines and do we give too many shots now?
The Aging Process
health.howstuffworks.com/wellness/aging/aging-process/aging.htm
Knowing how and why your body changes with age can help you prevent certain conditions and slow down the aging process. Learn about the aging process here.
10 Off-label Uses of Antidepressants
health.howstuffworks.com/medicine/medication/10-off-label-uses-antidepressants.htm
Antidepressants are often used to treat things that aren't depression. Find out about off-label antidepressant use at HowStuffWorks.
How Flamethrowers Work
science.howstuffworks.com/flamethrower.htm
When humans discovered fire, they learned to cook their food in a controlled environment. What came next? Flamethrowers, of course. What do flamethrowers have in common with their living counterpart -- fire breathers?
How Radio Controlled Toys Work
science.howstuffworks.com/rc-toy.htm
RC toys come in many varieties from cars to robots. Learn about the parts of a radio controlled toy and see how RC toys operate without the aid of wires.
How Cruise Control Systems Work
auto.howstuffworks.com/cruise-control.htm
Cruise control is already an amazing system, and it's evolving into something a lot more powerful. Learn how cruise control works and check out some of the adaptive systems in development.