Innovation

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.

By Patrick J. Kiger

Energy drinks are everywhere, but how exactly are they supposed to give you energy? What's really in them, and are they safe? Find out.

By Stephanie Watson

In an age of health-conscious consumers, low-carb diets and bottled water, one snack has stood the test of time. Twinkies are an icon of junk-food snacks and guilty pleasures, nutritionally worthless yet irresistibly yummy.

By Ed Grabianowski

Water and vitamins help keep us alive and healthy. So if you put the vitamins in the water, wouldn't you be even healthier? Check out Glaceau's Vitaminwater and see if it really does what it claims to do.

By John Fuller

Many people consider caviar, unfertilized sturgeon eggs, to be a delicious delicacy. But how exactly is this luxury harvested, and what is the proper way to eat it?

By Laurie L. Dove & Austin Henderson

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?

By Robert Lamb

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?

By Robert Lamb

Five metallic balls on slender threads sit side by side. As one on the end hits the rest, the one on the opposite end rises and falls. Why don't the balls in the middle move? It's complicated.

By Chris Schulz

We humans aren't complete slaves to time. We've devised ways to pack an extra hour of sunshine into our day, thanks to daylight saving time. But who came up with this idea and why do so many people loathe it?

By William Harris, Kathryn Whitbourne & Desiree Bowie

Does a chocolate a day keep the doctor away? Before you stock your fruit bowl with chocolate bars, you might want to read this article first.

By Shanna Freeman

Breastfeeding is a healthy way to feed young children, but busy schedules and other factors may keep mom from being available when baby's hungry. Breast pumps can help bridge that gap.

By Melanie Winderlich

People donate their bodies to science all the time, usually after death. Here, we highlight 10 scientists who experimented on themselves while they were still alive. Not always such a good idea, eh Dr. Jekyll?

By Josh Clark

The Hybrid Sports Bike, still in its prototype stage, is a three-in-one: a pedal-powered bicycle souped-up with both a gas engine and an electric motor. But how could a gas-powered bike be environmentally friendly?

By Julia Layton

Despite a ho-hum name, paper shredders have an extraordinary (and juicy) history featuring the likes of Oliver North, Enron and all sorts of spies. What story will thrust this commonplace technology back in the limelight next?

By Kate Kershner

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

By HowStuffWorks.com Contributors

Comic book character Popeye is synonymous with being strong thanks to all the iron in the spinach he eats. But lately, there's been some talk that spinach is not all that good a source of iron and, in fact, it got the claim by error.

By Laurie L. Dove

Smartphones, tablets and other devices are not just useful; they can improve your social life. We'll look at some of the newest ways to integrate social media into whatever you're doing.

By Dave Roos

It's a great pick-me-up in the morning and a perfect finish to a good meal. Ever think about trying to make this stuff at home? Find out what espresso actually is and how to make a perfect shot every time.

By Madeline Bullock

In the past few years, tooth-whitening has exploded as the physical upgrade of choice. Unlike nose jobs and chin tucks, just about anybody can afford to try this at home. Learn about different whitening techniques and how they work, and decide if you should give it a try.

By Dr. Jerry Gordon

Although it's fairly easy to make at home or pick up at your local grocery store, ice cream is actually a very complex substance. Learn what goes into ice cream, how it's made and who invented it.

By Ed Grabianowski

Sushi is much more than raw fish. Learn about types of sushi, where it came from, how to make it at home and what it's like to visit a sushi bar.

By Ed Grabianowski

Many dieters use artificial sweeteners as a way to cut sugar without eliminating all things sweet. But did you know that some artificial sweeteners have almost as many calories as sugar? Find out how artificial sweeteners work.

By Lee Ann Obringer

Breast implants are becoming a popular high school graduation present for parents in the U.S. to give their teens. Learn all about breast implants and the surgical process of augmentation.

By Robert Valdes

Moonshining has evolved from backwood stills in the South. In fact, it's downright trendy in some bars. But, why is homebrewing and winemaking legal, but not distilling your own moonshine?

By Ed Grabianowski & Melanie Radzicki McManus

Not only do we need to consume salt, we also need it for a variety of nonfood uses. But if it's so important, why do health organizations recommend that we closely watch our intake? Apparently, there can be too much of a good thing. Learn what happens when we overload on salt or get too little of it.

By Shanna Freeman