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What are the Nazca lines?
science.howstuffworks.com/science-vs-myth/unexplained-phenomena/nazca-lines.htm
Long before crop circles captured the world's imagination, a Peruvian culture called the Nazca went about creating a series of intricate lines -- sometimes in the shapes of animals -- on the desert floor. But how'd they do it -- and why?
How Much Do You Know About Tractors?
play.howstuffworks.com/quiz/how-much-do-you-know-tractors
They're fun, they're useful, and they're not just for the farmland. Tractors can do so much, and there are so many varieties to choose from! In this quiz, we'll test your knowledge of tractors. If you fail, we won't make you plow a field.
How the Doppler Effect Works
science.howstuffworks.com/science-vs-myth/everyday-myths/doppler-effect.htm
The Doppler effect is why you hear the sound from a moving object change as it nears and passes you. Find out how the Doppler effect works.
How Aerogels Work
science.howstuffworks.com/aerogel.htm
Aerogels are incredible materials that could have dozens of uses from insulation to oil spill cleanup. Learn about aerogels in this article.
Can We Guess Your Last Name?
play.howstuffworks.com/quiz/can-we-guess-your-last-name
What does your last name say about you? Answer these quiz questions about it, and we'll see if it says enough to give it away. Unless it's something with 14 letters, the chances are high we'll get it right. Will we, though?
How Capacitors Work
electronics.howstuffworks.com/capacitor.htm
The capacitor plays a crucial role in electronics - the capacitor stores electrons for when they're needed most. Learn more about the capacitor.
Only the Sharpest Minds Can Name the Objects in These Close-Up Photos
play.howstuffworks.com/quiz/only-the-sharpest-minds-can-name-the-objects-in-these-closeup-photos
"I spy, with my little eye ..." Do you remember playing this game as a kid? Welcome to the more grown-up version! See how many of these close-up objects you can identify in this clever quiz.
How Congressional Investigations Work
people.howstuffworks.com/congressional-investigations.htm
Investigations have been a part of the U.S. Congress since 1790. Learn about how effective they are in this article at HowStuffWorks.
Can You Identify All of These NBA Stars From the Past Decade?
play.howstuffworks.com/quiz/can-you-identify-all-of-these-nba-stars-from-the-past-decade
From "The King" to "The Black Mamba," these NBA stars defined the last decade with their stellar play and captivating highlights. What are the chances you can identify them all? Jump into this quiz to find out!
NASA's 10 Greatest Achievements
science.howstuffworks.com/ten-nasa-achievements.htm
NASA's 10 greatest achievements range from technical feats to displays of human ingenuity. Learn about NASA's 10 greatest achievements.