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What Are Imaginary Numbers?
science.howstuffworks.com/math-concepts/imaginary-numbers.htm
An imaginary number is a value that's the square root of a negative number. It can't exist on a one-dimensional number line. We'll explain.
Can your car tell you when the light's about to change?
auto.howstuffworks.com/can-your-car-tell-you-when-light-will-change.htm
Can your car tell you when the traffic light is ready to change? Learn about Audi's Project Traffic Light Online system at HowStuffWorks.
Why are blueprints blue?
science.howstuffworks.com/engineering/structural/blueprints-blue-.htm
Why are blueprints blue and not some other color? There's a specific chemical process behind it, and its discovery has all the elements of a dark fairy tale.
The Drone Quiz
play.howstuffworks.com/quiz/drone-quiz
These tiny flying machines are everywhere - even carrying packages and pizzas. How much do you know about drones? Take this quiz to find out.
Why do cookie-cutter neighborhoods exist?
The identical ranks of cookie-cutter neighborhoods have been immortalized (and often satirized) in American pop culture, but who first came up with the idea for these "little boxes on the hillside?"
Self-Quarantine Might Feel Like House Arrest, But It's Not
people.howstuffworks.com/house-arrest.htm
During this period of self-quarantining, you might feel like you're on house arrest, just without the angle bracelet. But how similar is it really?
How Long Does the Once-dimming Star Betelgeuse Have Left?
science.howstuffworks.com/betelgeuse.htm
Star-gazers gasped when they saw how much Betelgeuse dimmed in 2019 and the reason wasn't clear. Even though it's back up to full strength, how long will it be before it explodes? We haven't seen a supernova in over 400 years.
Why There Is So Much Confusion About Who Has Food Allergies
HowStuffWorks looks at a new study on adults and food allergies and how they differ from food intolerance.
5 Secrets You Didn't Know About Nancy Drew
entertainment.howstuffworks.com/arts/literature/5-secrets-didnt-know-about-nancy-drew.htm
HowStuffWorks learns more about Nancy Drew, Carolyn Keene and the latest spinoffs of the Nancy Drew series.
How to Clean Grout
Cleaning grout may not be your favorite pastime, but doing it right can make it a not-quite-so-unpleasant task. Here's how.