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Why Are School Buses Yellow?
science.howstuffworks.com/why-are-school-buses-yellow.htm
The iconic "school bus yellow" was the invention of an educator named Frank Cyr. But if yellow is so good for visibility, why don't all fire trucks use it too?
Complementary Eyeshadow Colors for Hazel Eyes
lifestyle.howstuffworks.com/style/makeup/eye/complementary-eyeshadow-colors-for-hazel-eyes.htm
Hazel eyes have a little something extra ... a multitude of colors visible at one time. Find out the complementary eyeshadow colors for hazel eyes at HowStuffWorks.
Frequency Formula Basics: 2 Ways to Calculate Frequency
science.howstuffworks.com/math-concepts/frequency-formula.htm
Frequency is a fundamental concept when you're talking about waves, whether that means electromagnetic waves like radio waves and visible light, or mechanical vibrations like sound waves.
Can you get a glow-in-the-dark tattoo?
people.howstuffworks.com/culture-traditions/body-art/can-get-glow-in-dark-tattoo.htm
Now you see it, now you don't. Find out how a tattoo can go from invisible to visible with the flick of a light switch at HowStuffWorks.
How to Artfully Cull Your Facebook Friends List
computer.howstuffworks.com/internet/tips/how-to-cull-facebook-friends-list.htm
Looking to trim down your Facebook friends list or make more of your posts visible to certain people? See how to artfully cull your Facebook friend list here.
Annuals Under 12 Inches
home.howstuffworks.com/annuals-under-12-inches.htm
Annuals under 12 inches work well at the front of gardens and along borders, since they leave the taller plants behind them visible. Learn which annuals stay under 12 inches high.
How Impossible Colors (Like Stygian Blue) Work
science.howstuffworks.com/impossible-colors.htm
What if there are colors within the visible spectrum that our brains can't perceive? In fact, there are. They're called impossible colors. But some researchers think they've discovered a way to see the impossible.
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 Can Light Kill Viruses?
science.howstuffworks.com/life/cellular-microscopic/light-virus.htm
Hand sanitizers can only get you so far in preventing a viral infection. Scientists are discovering how visible light can be used to destroy viruses. Learn about the laser technique and what it means for the future.
How Far Can the Human Eye See?
science.howstuffworks.com/question198.htm
Just how far can the human eye see? There's no exact formula to figuring it out, but we do have an idea.