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What is a funicular railway?
science.howstuffworks.com/engineering/civil/question512.htm
In the news about the recent accident at a ski resort in Austria, the reporters called the cable car that carried the skiers up the mountain a "funicular railway." What is that and how does it work?
What is a gimbal -- and what does it have to do with NASA?
science.howstuffworks.com/gimbal.htm
What is a gimbal -- and what does it have to do with NASA? Gimbals help ships and space ships stay correctly oriented. Find out what is a gimbal.
What is a keyhole satellite and what can it really spy on?
science.howstuffworks.com/question529.htm
On a television drama last week, the plot involved photos taken of a Russian missile silo, and the characters mentioned a "keyhole satellite." What is a keyhole satellite and what can it really spy on?
What is a levee?
science.howstuffworks.com/engineering/structural/levee.htm
Whether they make you think of Hurricane Katrina or Led Zeppelin, levees are a critical safety feature for low-lying areas located near water. Why do they break?
What is a nano quadrotor?
science.howstuffworks.com/innovation/science-questions/nano-quadrotor.htm
Seven million (and counting) YouTube viewers can't be wrong. Nano quadrotors are tiny, autonomous flying machines that have the Internet buzzing.
What is a provisional patent?
science.howstuffworks.com/innovation/new-inventions/provisional-patent.htm
Even though it's not even really an application, filing a provisional patent application can give you a head start as you begin the process of protecting your invention.
What is a punkin chunkin?
science.howstuffworks.com/transport/engines-equipment/question502.htm
A punkin chunkin is explained in this article. Learn about a punkin chunkin.
What is a tank engine, as in Thomas the Tank Engine?
science.howstuffworks.com/transport/engines-equipment/question275.htm
Thomas the Tank Engine is a merchandising phenomenon that includes small wooden train sets, video tapes, books, clothing, an official Web site and tons of fan sites. But wait, what exactly is a "tank engine" anyway?
What is a virus, and how does it become a danger to human life?
science.howstuffworks.com/life/cellular-microscopic/virus-danger.htm
A virus can be dangerous. Learn about virus dangers and what exactly is a virus. Get informed about virus dangers at HowStuffWorks.
What is a wavelength?
science.howstuffworks.com/what-is-wavelength.htm
Wavelengths are used to measure the size of a wave. Learn about wavelengths in this article.