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15 Types of Gemstones to Add a Little Sparkle to Your Life
science.howstuffworks.com/environmental/earth/geology/types-of-gemstones.htm
From ancient amulets to modern engagement rings, different types of gemstones have always caught the human eye.
What Is a Group of 5 Called? An Overview of Musical Ensembles
entertainment.howstuffworks.com/what-is-a-group-of-5-called.htm
Ever heard a song performed by five singers or seen a table set for five and wondered, "What is a group of five called?"
When Were the Twin Towers Built?
science.howstuffworks.com/engineering/structural/wtc.htm
The twin towers of the World Trade Center were true originals -- their history is one of innovation, persistence and grand ideas.
How the International Space Station Works
science.howstuffworks.com/international-space-station.htm
In 1984, President Ronald Reagan had a vision for a permanently inhabited space station. Today that vision is a reality we know as the International Space Station.
Is hydrogen fuel dangerous?
auto.howstuffworks.com/fuel-efficiency/alternative-fuels/dangerous-hydrogen-fuel.htm
Hydrogen fuel is an attractive alternative fuel source. Learn about hydrogen fuel and the dangers of the element, including the Hindenburg disaster story.
Who owns the oceans?
science.howstuffworks.com/environmental/earth/oceanography/international-water.htm
International water covers 71 percent of the Earth's surface and includes five oceans. Learn how international water is shared among all the nations.
8 Home Remedies for Whiter Teeth
health.howstuffworks.com/wellness/natural-medicine/home-remedies/home-remedies-for-whiter-teeth.htm
Our home remedies for whiter teeth warn you how to avoid stained teeth, and also discuss tooth whitening methods.
How to Insulate Windows
home.howstuffworks.com/home-improvement/heating-and-cooling/insulate-windows.htm
Insulating windows can help save on energy costs. Learn how to insulate windows at HowStuffWorks.
How Brake Rotors Work
auto.howstuffworks.com/auto-parts/brakes/brake-parts/brake-rotors.htm
Most drivers know the brakes on their vehicle have to be properly maintained to remain functional. But how many know that they can select new brake rotors based on the type of driving they do?
What are solar air heaters?
home.howstuffworks.com/solar-air-heaters.htm
With fuel costs and other factors, solar air heaters are getting more attention. Learn about solar air heaters and how they can heat your home.