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How did ancient civilizations use sundials to tell time?
electronics.howstuffworks.com/gadgets/clocks-watches/ancient-civilizations-use-sundials.htm
Ancient sundials first popped up in Egypt around 1500 B.C. Learn how these sundials came about and what they were used for all those centuries ago.
How the iPad Works
electronics.howstuffworks.com/gadgets/high-tech-gadgets/ipad.htm
Some say the Apple iPad will revolutionize the computer tablet -- and save the publishing industry. Learn all about the iPad's features and uses.
How Electricity Works
science.howstuffworks.com/electricity.htm
Electricity surrounds us and can be used thousands of different ways. Learn about the basics of electricity, from generators and electrical circuits to voltage and currents.
How Roller Coasters Work
science.howstuffworks.com/engineering/structural/roller-coaster.htm
They don't have engines, brakes or accelerators. No, these amazing machines rely on physical, centripetal and gravitational forces to urge thrills, screams and that sinking stomach feeling we all love (and hate). Read more about the science of fun.
The 4th Dimension: Where Science and Imagination Collide
science.howstuffworks.com/science-vs-myth/everyday-myths/see-the-fourth-dimension.htm
Can we see the fourth dimension or is it something that is beyond our grasp? Find out if it is possible to see the fourth dimension in this article.
10 iPad Apps for Teaching Kids About Science
computer.howstuffworks.com/tablets/10-ipad-apps-for-teaching-kids-about-science.htm
There are several iPad apps that teach kids about science. Take a look at our list of 10 iPad apps for teaching kids about science to get started.
How Aerobatics Works
science.howstuffworks.com/transport/flight/future/aerobatics.htm
Aerobatics in an airplane is an incredible display of skill and nerves. Learn about the history of aerobatics in this article from HowStuffWorks.
What are high-efficiency washers?
home.howstuffworks.com/high-efficiency-washers.htm
Whether you want to protect the environment or protect your clothes from wear and tear, high-efficiency washing machines are picking up momentum in the marketplace. Talk about going green: You'll even save some cash on your electric and water bills.
How Lasers Work
science.howstuffworks.com/laser.htm
Lasers are used in dental drills, eye surgery, tattoo removal, and (of course) laser pointers. Learn how different lasers generate such concentrated light.
How Blenders Work
home.howstuffworks.com/blender.htm
What do chefs, bartenders and geneticists have in common? They all use blenders. A blender is an appliance you can't live without if you want to turn solid ingredients into liquid deliciousness.