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Why does hydrogen peroxide foam when you put it on a cut?
Why does hydrogen peroxide foam when you put it on a cut?
SCIENCE QUESTIONS
Science questions are a fun and interesting way to learn about planet Earth, organisms and the universe. In this section you'll find an incredible collection of science questions covering a wide variety of topics.
Stuff You Should Know
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Aren't there machines that can detect liquid explosives?Learn how a machine can detect liquid explosives in sealed containers. See more »
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Can you build a better … chair?
No really, can you? Sure, there are lots of chairs out there. Some rock. Some roll. Some recline. Some remain so crazy modern that we're afraid to direct our keisters onto their serious coolness. How you would change this staple of sedentary life? See more »
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Can you build a better … fork?
You've set the table at least once in your life, right? Have you ever wondered why we need all that silverware? And so we challenge you, inventive, fork-wielding readers, to come up with a design for the master fork, the one that will put all other utensils to (stainless) shame. What's your idea? See more »
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Can you build a better … litter box?
Statements we know to be true: There's a lot of pet poop in the world, and there has to be a better way to handle it. So, we're asking you, inventive readers, to get your hands dirty and send us your ideas for a better litter box. See more »
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Can you build a better … mousetrap?
We humans like to think we're so technologically advanced, yet mice constantly prove us wrong, handily evading our efforts to trap them. So we at HowStuffWorks.com are asking you to devise a better mousetrap. Isn't it about time mice learned how advanced humans really are? See more »
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Can you build a better … toilet?
You may do some of your best thinking on the can, but we assume you're not thinking too much about the toilet itself. We at HowStuffWorks.com think you should be, and so we're challenging you to build a better toilet. What's your bright idea, reader? See more »
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Can you power an iPod with an onion?
What if your trusty white earbuds fell silent one day, and your charger was nowhere to be found? Would rifling through the vegetable drawer restore the music? See more »
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Could I power my computer or my TV with a bicycle generator?
I live in California, where we are having a power crunch. I have a hypothetical question: Could I power my computer or my TV with a bicycle generator? See more »
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Do backscatter X-ray systems pose a risk to frequent fliers?
The backscatter X-ray system that can see through clothes has begun its test run at the international airport in Phoenix. But privacy is only one concern facing its implementation. See more »
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How are Crayons and markers made?
Crayola crayons have nurtured childhood creativity and remained safely edible for over 100 years. Now learn their story- how they originated in the 19th century, how they've changed, and we'll even tell you how old that familiar label is. See more »
