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How can I make a pinewood derby car go faster?
entertainment.howstuffworks.com/question169.htm
Pinewood derby cars are a favorite pastime for kids and adults alike. Learn how pinewood derby cars use gravity and how you can make yours go faster.
How rare are double rainbows?
science.howstuffworks.com/nature/climate-weather/atmospheric/double-rainbows-rare.htm
A double rainbow, man! Just the sight of one can send us babbling into happiness. And why not? Rainbows are beautiful. And two rainbows at the same time? Even better. But just how rare are these colorful arcs?
Saturn's Rings Will Exist for Just a Blip in Time
science.howstuffworks.com/saturns-rings-blip-in-time.htm
Saturn's rings will completely disappear in the next 100 million years. Learn more about Saturn and its famous rings at HowStuffWorks.
Time, Space and Everything in Between: The Astrophysics Quiz
play.howstuffworks.com/quiz/astrophysics-quiz
The field of astrophysics covers some of the biggest questions about the universe. How did it form? What will happen to it? How do solar systems form? What are stars made of? Is time travel possible? Test your smarts on astrophysics with this quiz.
The Solar System: Planets and Formation Explained
science.howstuffworks.com/46010-solar-system-explained.htm
While we generally picture the sun and planets when thinking about our solar system, it also consists of comets, asteroids and hundreds of moons.
The September 11 Attacks Quiz
play.howstuffworks.com/quiz/september-11th-attacks-quiz
On Sept. 11, 2001, terrorist attacks on America altered the world's political and military landscape. How much do you really know about the history of these atrocities?
How the Sun Works
science.howstuffworks.com/sun.htm
The sun warms our planet every day, provides the light by which we see and is necessary for life on Earth. Learn about the sun.
How Skyscrapers Work
science.howstuffworks.com/engineering/structural/skyscraper.htm
People build skyscrapers primarily because they are convenient -- you can create a lot of real estate out of a relatively small ground area. They're also awe-inspiring. Skyscrapers capture our imagination -- how high can we build them? Learn about the architecture and design of these monumental buildings.
How Ethiopian Traditions Work
people.howstuffworks.com/culture-traditions/national-traditions/ethiopian-tradition.htm
Many Ethiopian traditions go back for hundreds of years. Find out about Ethiopian traditions at HowStuffWorks.
Did Henry Ford invent the car?
auto.howstuffworks.com/under-the-hood/auto-manufacturing/did-henry-ford-invent-the-car.htm
There's perhaps no single person more associated with the automobile than Henry Ford. But did Henry Ford actually invent the car? Find out.