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Can two cans and a string really be used to talk over a distance?
science.howstuffworks.com/question410.htm
I was watching an old movie today, and two kids (neighbors) were talking to each other using two tin cans and a string. Does that really work? If so, why does it work?
How do they start jet engines on airplanes?
science.howstuffworks.com/transport/flight/modern/question411.htm
How do you start a gas turbine engine? What is the mechanism to begin the rotation of the large fan blades?
The Science of Shade: Unlocking Photochromic Lenses
science.howstuffworks.com/innovation/science-questions/question412.htm
How can my glasses change from transparent, when I'm inside, to dark when I go outdoors?
How is sound recorded on motion picture film?
entertainment.howstuffworks.com/question413.htm
How is sound recorded on motion picture film?
How does a movie clapperboard work?
entertainment.howstuffworks.com/question414.htm
What is the black and white board with a strip on top that movie directors use?
How do kosher foods work?
recipes.howstuffworks.com/question416.htm
When a food package says "Kosher" or "Pareve," what does it really mean? How do Kosher foods work?
How do trick birthday candles work?
science.howstuffworks.com/innovation/science-questions/question420.htm
How do trick birthday candles work -- the kind that re-light themselves after you blow them out?
Where are all the Internet domain names registered and maintained?
computer.howstuffworks.com/question422.htm
Where are all the Internet domain names registered and maintained?
How do store coupons work?
money.howstuffworks.com/personal-finance/budgeting/question426.htm
How do store coupons work? How does the store get its money back?
Why Golf Course Grass Looks So Perfect
science.howstuffworks.com/life/botany/question428.htm
How can the grass on the greens at a golf course be so perfect? What are they doing that's different from a normal lawn? Could my lawn look like this?