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.


Why is the sky blue? What's relativity all about? If you're thinking, "something to do with light and physics and stuff," we have some short explanations for you.

On its good days, science is incredible and enlightening. On its bad days, science can be anywhere from gross to downright bizarre. What are some of science's craziest questions? (And why did anyone want to answer them?)

"Objects in mirror are closer than they appear." That little line appears so often and in so many contexts, it's almost lost all meaning -- but why is it there, and what does physics have to do with it?

In the simple rubber hand illusion, a subject is made to believe a rubber hand is in fact his own. How does this clever parlor trick work, and how could it help shed light on body-related distortions?

Nuclear plants provide the world with much of its electricity. Learn why Uranium-235 is ideal for nuclear power, in this article.

Taking into account orientation, inclination, weather, electricity demands and voltage will help you figure out whether solar panels will be efficient on your house. Learn whether solar panels will be efficient on your house in this article.

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.

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?

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?

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?

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?

Gravity dictates the structure of the universe, from the way cosmic bodies form to the way they orbit more massive planets or stars. Has it always played such a starring role in our cosmic history?

Gravity is great, but if we could figure out how to selectively reduce its effects, we could cut the energy demands of travel and transportation. Don't cheaper airline tickets sound pretty good?

Touch-sensitive lamps is explored in this article from HowStuffWorks. Learn about touch-sensitive lamps.

At HowStuffWorks, we're always curious, and 2008 gave us a lot to be curious about -- financial bailouts, skyrocketing food prices and, of course, the Google algorithm. Here are our top 10 questions of the year -- answered. What are yours?

Before you hurriedly unwrap a stick of gum and twist the foil around the closest blown fuse, you may want to consider a few things. You could have a fixed fuse -- or a full-blown fire.

You stay behind at work and agree to close up alone. You go into the walk-in freezer to put away some food, and the door shuts behind you. You do everything you can think of, but you can't get it open. Now what?

In movies, bad guys can take over an airplane and start shooting up the place. Wouldn't the plane explode or depressurize as soon as the bullet pierced its skin?

A man has a gun. But this is no ordinary man, and this is no ordinary gun. This isn't a setup for a sci-fi thriller. It's the premise for quantum suicide.

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.

Learn how a machine can detect liquid explosives in sealed containers.

You know that bumper sticker that says "Shoot your TV"? Click here to find out what would happen if you actually tried it (it's best to let us do the dirty work).

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?

How does chlorine work to clean swimming pools?