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Today's Mind-blower
How Sea Monsters Work

Whether we live in fear of a kraken or the Leviathan, humans all around the globe have made sea monsters a part of their cultures. Is there a drop of truth to any of these widespread tall tales?

    • 10 Wildly Wrong Animal Stereotypes
      animals 10 Wildly Wrong Animal Stereotypes

      The world is full of cuddly koalas, loyal dogs and friendly dolphins. Or is it? Even positive animal stereotypes can be dangerous if they lead to humans making poor judgment calls.

    • Who is the most famous person of all time?
      history Who is the most famous person of all time?

      Many people enjoy their cliched "15 minutes" these days, but their notoriety quickly fizzles out. The most famous among us remain iconic across generations. But how can you measure John Lennon's fame against Muhammad's?

    • Top 10 Hobbies That Can Pay Off
      money Top 10 Hobbies That Can Pay Off

      Most people take up hobbies for fun, and even ones that seem free (like running and hiking) can turn into a money sink in a hurry. Here are 10 hobbies that can turn into money-makers instead.

    • How Quantum Suicide Works
      science How Quantum Suicide Works

      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.

    • 10 Absolutely Worst Foods to Eat
      science 10 Absolutely Worst Foods to Eat

      We all eat things we probably shouldn't, and that's OK from time to time. But there are some foods that are such nutrition bombs that even occasional indulgence isn't exactly wise.

    • What will Earth look like in 500 years?
      science What will Earth look like in 500 years?

      "The 26th century" doesn't roll off the tongue as easily as "the 21st century" does. But that hasn't stopped us from imagining what our hometown planet will be like in a few hundred years. Any guesses?

    • What are the white dots on my nails?
      health What are the white dots on my nails?

      You notice a white dot on your fingernail. You try to scrub it off and realize the little white dots are not paint; they're actually part of your nail. What could they be?

    • 10 Amazing Things People's Brains Have Done
      science 10 Amazing Things People's Brains Have Done

      The human brain can do some amazing things -- and humans can do amazing things because of it. Here are 10 of the most wondrous and unusual feats ever performed by a person's brain.

    • 10 Everyday Things You're Probably Doing the Hard Way
      home 10 Everyday Things You're Probably Doing the Hard Way

      Despite our desire for ease, studies show that we may be able to make ourselves smarter by doing things the hard way. But why make life trickier than it needs to be?

    • The History of the Death Tax
      money The History of the Death Tax

      Whether you call it an estate tax or a death tax likely depends on your point of view: Is it a tax that benefits society or penalizes the wealthy? Whatever your opinion, learn more about the evolution of this controversial tax.

    • 10 Fake Scarcities
      science 10 Fake Scarcities

      We're running out of oil. And diamonds. And while we're at it, chicken wings, too! Relax, these are actually examples of shortages that really aren't. What else is a fake scarcity?

    • How could a laser pointer take down a plane?
      electronics How could a laser pointer take down a plane?

      In the United States, it's a felony to knowingly aim a laser pointer at an aircraft. And for good reason: Those little red dots have landed pilots in the hospital.

    • Quiz: Are you smarter than Barack Obama?
      history Quiz: Are you smarter than Barack Obama?

      The 44th U.S. president graduated from Harvard Law School and won the Nobel Peace Prize, but there's a chance you might know something he doesn't. A slight one. Take this quiz to find out.

    • 10 Crackpot Theories About Space
      science 10 Crackpot Theories About Space

      Our knowledge of space changes all the time as new discoveries are made. But some ideas about the universe have never really held water – including the one that everything is made of frozen H2O.

    • Top 10 Things You Should Not Share on Social Networks
      computer Top 10 Things You Should Not Share on Social Networks

      If your Facebook status update reads, "Leaving for France!" you're not just gloating about your trip. You're letting everyone know that your house will be empty for about 10 days. Bad idea.

    • 10 Hardest Habits to Break
      health 10 Hardest Habits to Break

      "I'm addicted to you baby. You're a hard habit to break." So wailed the lead singer of the group Chicago. But there are harder habits to break out there – like nail biting and procrastinating. Do you do any of the things on our list?

    • Can plants think?
      science Can plants think?

      Thinking allows us to solve problems, plan ahead and defend ourselves from outside threats. It's what separates us from "lower" life-forms like plants, right? Well, maybe not.

    • How many atoms are in a person?
      science How many atoms are in a person?

      Atoms: the building blocks of life and the universe. We're all made of these microscopic bits of matter, but how many does it take to make a complete human being? And exactly what kinds of atoms do we have inside us?

    • What causes underarm darkening?
      health What causes underarm darkening?

      Deodorant can help to prevent your underarms from committing olfactory offenses. But what can you do about pigmentation problems under there?

    • 10 Reasons You Might Not Know You're Pregnant (Until You're in Labor)
      health 10 Reasons You Might Not Know You're Pregnant (Until You're in Labor)

      Whether pregnancy is planned or a surprise, most women quickly realize they're carrying a developing child. But what if a pregnancy is both unplanned and unknown to the woman who's pregnant?

    • Top 10 Low-light Plants
      home Top 10 Low-light Plants

      Plants have pretty basic needs. They crave water, healthy soil and rays of sunshine. But if you can't provide your flora with lots of direct sun, you can still grow these low-light plants in your shady garden.

    • 10 Real Events That Seem Like Hoaxes
      history 10 Real Events That Seem Like Hoaxes

      Did you hear the one about Elvis meeting President Nixon to help the youth stay off drugs? Or 50 Cent performing at a bat mitzvah? These may sound like urban legends, but this time the events are all true.

    • 10 Ways to Make Extra Money From Home
      money 10 Ways to Make Extra Money From Home

      Who couldn't use a little extra cash at some point? You may not have the time to go out and hit the pavement in search of a second job, but you could use the skills you have to get the dough you need.

    • 10 Healthy Ways to Build Credit
      money 10 Healthy Ways to Build Credit

      For something so relatively easy to obtain, credit can easily cause a careless borrower lots of stress. Here are 10 simple ways to build credit -- and keep it.

    • 10 Ways to Cook Kale
      recipes 10 Ways to Cook Kale

      Kale packs a nutritional wallop -- 1,300 percent of your daily vitamin K, for starters -- and is incredibly versatile and easy to cook. Here are 10 ways to cook kale.

    • 10 Classy Wedding Shower Ideas
      lifestyle 10 Classy Wedding Shower Ideas

      Unlike friends-only bachelorette parties, bridal showers include mothers-in-law of all shapes and sizes. A gift of lingerie could send a guest into paroxysms. How do you plan a shower that's fun for everyone?

    • 10 Worst Computer Viruses of All Time
      computer 10 Worst Computer Viruses of All Time

      Most computer-savvy people know about viruses and how to prevent an infection. But what are some of the most destructive viruses of all time, the record-smasher server-crashers?

    • 10 Things Your Hair Stylist Doesn't Want You to Know
      lifestyle 10 Things Your Hair Stylist Doesn't Want You to Know

      You may love your hair stylist. He makes you look like a star and gives you the best scalp massage in town. But he's also getting paid. What are 10 things your stylist could be keeping close to the chest?

    • Top 10 Ways to Get More Followers on Twitter
      computer Top 10 Ways to Get More Followers on Twitter

      It's the age-old falling tree question: If you tweet and no one is around to hear it, does it make a difference? How can you attract followers so that your tweets aren't made in vain?

    • 10 Tips for Your First Day of Work
      money 10 Tips for Your First Day of Work

      It's hard to find a job these days, but once you get your foot in the door, try not to put it in your mouth -- at least, not right away. Here are some tips designed to help you make the right first impression on your first day at work.

    • 10 Common Sayings You're Probably Saying Wrong
      people 10 Common Sayings You're Probably Saying Wrong

      Maybe you could care less about grammar. After all, it's a doggy-dog world, and you're OK as long as people know what you mean, right?

    • Top 10 Causes of Car Fires
      auto Top 10 Causes of Car Fires

      The National Fire Protection Association (NFPA) says that vehicle fires account for about 20 percent of all reported fires, so it's worth knowing how to reduce some of the risk in your own car or truck.

    • 10 Trade Secrets We Wish We Knew
      money 10 Trade Secrets We Wish We Knew

      Protected by legal agreements, fail-safes and vaults, the world’s most valuable trade secrets rake in millions of dollars for their owners. Here are 10 lucrative legends.

    • 5 NASA Inventions You Won't Believe
      science 5 NASA Inventions You Won't Believe

      Since 1958, NASA has had to invent everything it needed to make space missions possible. These five amazing inventions, developed by NASA for use in space, have found some amazing Earth-bound applications.

    • 10 Treasures We’ll Lose as Sea Levels Rise
      science 10 Treasures We’ll Lose as Sea Levels Rise

      The oceans are rising, and they're threatening to take down some of the world's brightest cultural gems. Here are 10 of the most notable spots potentially endangered by climate change.

    • 10 New Uses for Old Inventions
      science 10 New Uses for Old Inventions

      You think you really know an invention until -- whammo -- someone comes up with a new use for it. Ointment that soothes tired cow teats and treats baldness? Who would have thought? Read on for 10 of our favorites.

    • 10 Best Snacks for a Road Trip
      adventure 10 Best Snacks for a Road Trip

      Road tripping soon? Don't snack on junk from the convenience store. Fill up on these healthy bites that go great in the car.

    • Top 10 Most Valuable Records
      entertainment Top 10 Most Valuable Records

      Some of the most valuable records on the market aren't what you'd think they would be. Did any favorites from your vinyl collection make the list?

    • 10 Essentials to Bring on a Road Trip
      adventure 10 Essentials to Bring on a Road Trip

      It's summertime, and the open road calls. There's so much to see, so much to do -- and so much to pack! Here are 10 road trip essentials.

    • 10 Surprisingly Fuel-efficient Sports Cars
      auto 10 Surprisingly Fuel-efficient Sports Cars

      There’s a saying about sports cars: They can pass anything on the road -- except a gas station. Here are 10 sports cars that break the stereotypical gas-guzzler image.

    • 10 Most Dangerous Places You Should Definitely Visit
      adventure 10 Most Dangerous Places You Should Definitely Visit

      It isn't necessarily advisable to visit any of these areas. But then again, if you're willing to take the risk, you'll get to explore places most people will never have the guts to see.

    • 10 Backyard Landscaping Ideas on a Budget
      money 10 Backyard Landscaping Ideas on a Budget

      If your backyard is overflowing with green but your wallet isn't, fear not. We've got some budget-friendly landscaping tips that'll keep your back lawn and your bank account in great shape.

    • Top 10 Things Your Nails Say About Your Health
      health Top 10 Things Your Nails Say About Your Health

      Whether trimmed or long, polished or plain, your nails say a lot about the state of your health. What warning signs are literally at your fingertips?

    • 10 Absolutely Worst Foods to Eat
      science 10 Absolutely Worst Foods to Eat

      We all eat things we probably shouldn't, and that's OK from time to time. But there are some foods that are such nutrition bombs that even occasional indulgence isn't exactly wise.

    • Are zoos good or bad for animals?
      animals Are zoos good or bad for animals?

      As you visit each amazing exhibit at your local zoo, do you ever feel a twinge of guilt or remorse when watching these enclosed creatures? Are zoos helping or hurting animals?

    • How does a GFCI outlet work?
      home How does a GFCI outlet work?

      In my bathroom there is a plug that has a "Test" and a "Reset" button. When I push the "Test" button, it cuts off the current to the outlet. What is this? How is it different from the fuse in the fuse box?

    • Why is Pluto no longer considered a planet?
      science Why is Pluto no longer considered a planet?

      On August 24, 2006, the International Astronomical Union (IAU), an organization of professional astronomers, passed two resolutions that collectively revoked Pluto's planetary status.

    • What will Earth look like in 500 years?
      science What will Earth look like in 500 years?

      "The 26th century" doesn't roll off the tongue as easily as "the 21st century" does. But that hasn't stopped us from imagining what our hometown planet will be like in a few hundred years. Any guesses?

    • What does business casual mean for women?
      lifestyle What does business casual mean for women?

      If ever there were a place to be concerned with appearances, it's at work. But when a dress code is as vague as "business casual," how does a woman know what's right and what's terribly wrong?

    • Is there something in turkey that makes you sleepy?
      science Is there something in turkey that makes you sleepy?

      It's Thanksgiving Day and your waistband is groaning, and you're heavy-lidded as you lift one more forkful of pumpkin pie to your mouth. Some say that tryptophan, an amino acid found in turkey, is the reason you want a nap after Thanksgiving dinner.

    • What are chemtrails, and should you be scared of them?
      science What are chemtrails, and should you be scared of them?

      It's difficult to look up in the sky during a clear day and not see at least one cloudy trail billowing from an airplane. Although they're officially called contrails, some people refer to them as "chemtrails" -- and have interesting explanations for their existence.

    • Why can't we convert salt water into drinking water?
      adventure Why can't we convert salt water into drinking water?

      Well, we can. But why don't we do more of it? With oceans and oceans of seawater, you'd think we could make enough freshwater to never go thirsty again

    • How many solar cells would I need in order to provide all of the electricity that my house needs?
      home How many solar cells would I need in order to provide all of the electricity that my house needs?

      How many solar cells would I need in order to provide all of the electricity that my house needs?

    • What is friendship?
      people What is friendship?

      In kindergarten, it may have been the girl who always gave you the frosting from her cupcake. As an adult, it may be the guy who will answer the phone at 2 a.m. when you need to talk. How do you define a friend?

    • Do whitening strips damage your teeth?
      health Do whitening strips damage your teeth?

      We know they give you pearly whites. But can those popular whitening strips damage your teeth?

    • Why do we have eyebrows?
      health Why do we have eyebrows?

      Eyebrows add expression to your face, and are often waxed and plucked in the name of beauty. But why do we have them in the first place, and what would happen if they went away?

    • Who invented the radio?
      science Who invented the radio?

      Many people consider Guglielmo Marconi the inventor of the radio. After all, he did get the Nobel Prize for it. But others credit Nikola Tesla because the Supreme Court upheld his patent for the invention of radio. So who should get the recognition?

    • How does someone become a saint?
      people How does someone become a saint?

      Becoming a saint in the Roman Catholic Church is designed to be lengthy and difficult process. What are steps involved in canonization?

    • How often should you wash your hair?
      health How often should you wash your hair?

      Most people wash their hair every day without fail. However, some go without shampoo for weeks, months and even years. Who's right?

    • How many calories does a person need daily?
      health How many calories does a person need daily?

      Daily calorie needs vary significantly from person to person. Learn how to calculate the number that’s right for your body.

    • Should I pop my zits?
      health Should I pop my zits?

      Though popping pimples is usually frowned upon, dermatologists often extract them for their patients. If it's safe for doctors to pop zits, is it OK for you to do it yourself?

    • Is brake flushing really necessary?
      auto Is brake flushing really necessary?

      It's a familiar scene: You're at your local auto service counter paying for an oil change and a tire rotation when your mechanic asks if you'd also like your brakes flushed. Is it really necessary?

    • How does death by hanging work?
      health How does death by hanging work?

      Hanging, when carried out with modern techniques, can be one of the quickest and most painless ways to be executed. But not all hangings are designed to be quick and painless.

    • Is there a real way to lose belly fat?
      health Is there a real way to lose belly fat?

      When it comes to the battle of the bulge, many of us are losing -- especially in the waist area. Is there a healthy, safe way to get rid of belly fat?

    • Can our brains see the fourth dimension?
      science Can our brains see the fourth dimension?

      Most of us are accustomed to watching 2-D films with flat images. But when we put on 3-D glasses, we see a world that has depth. We can imagine existing in such a world because we live in one. What about another dimension altogether?

    • How do antibiotics work?
      health How do antibiotics work?

      An antibiotic selectively kills bacteria, but not the cells in your body. How do these mighty meds work their magic?

    • Why does my stomach growl?
      health Why does my stomach growl?

      Whether you call it grumbling, gurgling or growling, sometimes your belly just won't keep quiet. What makes your stomach growl, and why does it seem to happen at the worst times?

    • Why are the keys arranged the way they are on a QWERTY keyboard?
      computer Why are the keys arranged the way they are on a QWERTY keyboard?

      The QWERTY keyboard dates all the way back to the first typewriters. Why are the keys arranged this way, rather than alphabetically?

    • How long does a car's air filter last?
      auto How long does a car's air filter last?

      Your car's air filter is the first line of defense against the dust, dirt, and debris that can quickly foul up the engine, causing poor performance and shortening the life of the car. How long does a car's air filter last?

    • Classic Muscle Car Pictures
      musclecars Classic Muscle Car Pictures

      See pictures of everyone's favorite fast, powerful, gas guzzling cars from the '60s and '70s. They may not be eco-friendly, but they sure were fun while they lasted.

    • Cool Foods and Drinks Pictures
      recipes Cool Foods and Drinks Pictures

      When the mercury rises, you need help keeping cool. These bites and beverages will refresh you whether you're at the beach, a backyard barbecue or just driving around town in the blistering heat.

    • Computer Hardware Pictures
      computer Computer Hardware Pictures

      Are you curious about what's inside your computer? Browse through these computer hardware pictures and take a tour of your PC, from RAM to hard drives and everything in between.

    • Real Estate Pictures
      home Real Estate Pictures

      If you own a home or are interested in owning one in the future, take a look at our real estate pictures. See how the market works, what affects it and what it takes to become a homeowner or landlord.

    • American Politics in Souvenirs and Slogans
      people American Politics in Souvenirs and Slogans

      Come convention time, you’ll see attendees sporting head-to-toe political regalia. What’s the history of these tiny statement-makers, and which campaign tchotchkes make plain old buttons look dull?

    • History of Radio Pictures
      electronics History of Radio Pictures

      You can’t see radio waves, but you can check out relevant telegraphs, vacuum tubes and early radio models in this gallery.

    • Green Science Pictures
      science Green Science Pictures

      This green science image gallery shows eco-friendly applications as they apply to scientific disciplines. Take a look at these green science pictures.

    • Oil Field Pictures
      science Oil Field Pictures

      These pics will take you to the jungles of Sumatra, the Niger delta and points in between all in the name of oil. Get ready to learn about oil all around the globe.

    • National Park Pictures
      adventure National Park Pictures

      Ever since the first national park was established in the United States, they've been a getaway for relaxation and adventure for humans, and a safe haven for wildlife. Take a journey through America's national parks.

    • African Animal Pictures
      animals African Animal Pictures

      Many kinds of animals are native only to Africa, such as gorillas, chimpanzees, zebras, giraffes, hippopotamuses. Take a gander at these amazing African animals and see how many you recognize.

    • Computer Pictures
      computer Computer Pictures

      Computers have come a long way in the past few decades -- from filling up a room to slim and sleek designs that can nearly fit in your pocket. Take a look at some of the old and new models and learn about all the different features and types of these amazing machines.

    • Parthenon Pictures
      adventure Parthenon Pictures

      The Parthenon was constructed thousands of years ago, but with so much pollution and so many visitors, it may not last for long. Take a look at the Parthenon in Athens, Greece.

    • Shark Pictures
      animals Shark Pictures

      Sharks are an intelligent and sometimes dangerous species of saltwater fish. Learn more about these often feared, often misunderstood creatures of the deep in this gallery.

    • Personal Hygiene Pictures
      health Personal Hygiene Pictures

      Do you floss, shower, comb your hair? Take a look at how your daily routine affects your health and learn about personal hygiene with this image gallery.

    • Sports Car Pictures
      auto Sports Car Pictures

      Feeling the need for speed? Get your fix here -- our sports car image gallery features some of the fastest, most powerful models the automotive world has ever known.

    • Weight Loss Tips Pictures
      health Weight Loss Tips Pictures

      Need some weight loss tips? Discover some weight loss tips in our image gallery and get quick and easy ideas for losing weight.

    • 5 Best and Worst Ways to Battle Belly Bloat
      health 5 Best and Worst Ways to Battle Belly Bloat

      Avoid bloating this bathing suit season by taking these bloating tips to heart and looking great in your slimmest bathing suit!

    • Stress Relief Pictures
      health Stress Relief Pictures

      Stress is a part of modern life, though it can be bad for your health. Learn ways to relieve stress that are simple and easy to do with this image gallery.

    • Mysterious Marine Animal Pictures
      animals Mysterious Marine Animal Pictures

      Ah, the secrets of the sea. In this gallery, we'll introduce you to some of the more enigmatic animals that drift in the ocean, swim in the sea or shoot their intestines out of their anus in saltwater. Jump in.

    • Gun Pictures
      science Gun Pictures

      Guns come in all shapes and sizes. Put on your safety gear and take a look at this gallery of revolvers, Glocks, shotguns and even flamethrowers.

    • Science and Nature: Fractals
      science Science and Nature: Fractals

      Fractals produce fascinating and intricate designs. Browse through this gallery featuring pictures of a variety of fractals like Mandelbrot and Julia sets and find out why nature is loaded with fractals.

    • Plus-size Brides
      lifestyle Plus-size Brides

      Plus-size brides aren't stuck with A-line dresses or full-skirted ball gowns. A simple sheath can flatter the figure when it's made from quality materials that skim over the body instead of clinging to it. Explore our beautiful plus-size bride album.

    • Motorcycle Pictures
      auto Motorcycle Pictures

      Motorcycles have evolved in countless ways since their creating near the beginning of the 20th century. Check out our motorcycle image gallery to see how this trend exploded into the coutless motorcycle models, choppers and sport bikes you know today.

    • Green Living Pictures
      home Green Living Pictures

      Do you want to learn simple ways to help preserve our planet? Discover some small steps we can take every day that can help save our planet. Check out these Green Living pictures to learn how.

    • Cool Camera Stuff Pictures
      electronics Cool Camera Stuff Pictures

      Cameras are everywhere -- in phones and cars, on buildings and street corners, and even in outer space. Check out the technology, gadgets and imagery that are all part of the bigger camera picture.

    • Body Works: Sleep Quiz
      health Body Works: Sleep Quiz

      Some days, there's nothing like a good nap, even if you know it might keep you up into the wee hours of the night. Have you ever pondered the secrets of sleep? Take this quiz to learn all about sleep and those little jumping sheep.

    • The Ultimate Toronto Quiz
      adventure The Ultimate Toronto Quiz

      Originally a meeting place for native-Americans, Toronto is now a diverse metropolis. Take in a ball game by day -- or visit the nearby waterfalls. There's a 700-acre zoo that the kids can really enjoy, and with thousands of restaurants to choose from, there's something for the whole family. Take our quiz to learn more about how Toronto works.

    • The Ultimate Must Tools for a Builder's Toolbox Quiz
      home The Ultimate Must Tools for a Builder's Toolbox Quiz

      The rows and rows of shiny new tools at your local DIY store can be very tempting. Before you go out and buy a bunch of tools you don't need and will never use, check out our quiz to see which five tools you definitely can't do without.

    • The Ultimate Ocean and Marine Life Quiz
      animals The Ultimate Ocean and Marine Life Quiz

      Oceans cover most of the Earth's surface. They include a vast diversity of life, everything from plants to large mammals. Oceans represent a truly undiscovered world for most people. Take this quiz and learn more about ocean life.

    • The Ultimate Superhero Quiz
      entertainment The Ultimate Superhero Quiz

      This quiz is able to leap tall buildings in a single bound. Bullets ricochet off its chest (although it ducks when the emptied gun is thrown at it). Test your knowledge of superhuman ability while we stretch your brain to the limits. Pow! Kunk! Whap!

    • A Nation Divided: Civil War Quiz
      history A Nation Divided: Civil War Quiz

      Although it ended more than a century ago, the scars of the Civil War are still with Americans today. Think you know more than the average Billy Yank or Johnny Reb about the blood and politics behind the war? Find out by taking our Civil War quiz.

    • Oops! The Great Mechanical Recalls Quiz
      science Oops! The Great Mechanical Recalls Quiz

      A product recall is bad news for consumers and for manufacturers. Some of the most notorious ones have involved medicines, such as Tylenol and Vioxx. But the makers of cars, coffee makers and computers sometimes have to offer mea culpas, too. How total is your recall on these factory flaws?

    • The Ultimate Repairing a Small Engine Quiz
      home The Ultimate Repairing a Small Engine Quiz

      So many of our tools and toys are powered by small engines. Think lawnmowers, chainsaws, outboard boats and snowmobiles. It's a good idea to have a working knowledge of how these systems work and what to do when they don't.

    • Apple Boot Camp Quiz: Drop and give me 20 (GB)!
      computer Apple Boot Camp Quiz: Drop and give me 20 (GB)!

      Boot Camp makes it possible for you to run both Mac OS X and Microsoft Windows on Mac computers. Think you know how to navigate both systems at once? Lace up your (digital) combat boots and show your knowledge.

    • Pump It Up! Heart Health Quiz
      health Pump It Up! Heart Health Quiz

      The heart is a pump, and like other pumps, break down and need repair. And it does break down for many people -- heart disease is the leading cause of death in the United States. How much do you know about the dangers that threaten it?

    • Sex Quiz
      health Sex Quiz

      How knowledgeable are you about sex? Test your knowledge with this sex quiz.

    • Fact or Fiction: Stretch Marks
      health Fact or Fiction: Stretch Marks

      Many a pregnant woman has slathered her belly with lotions in a vain attempt to avoid stretch marks. But the truth is, most women get them at some point or another, whether it happens during pregnancy or not. So is there anything you can do about it?

    • The Ultimate Sex Quiz
      health The Ultimate Sex Quiz

      Making love. A roll in the hay. The mattress mambo. Doin' the deed. Ready to test how much you know about sex? As Marvin Gaye would say, let's get it on.

    • Seeing Red: Test Your Anger Knowledge
      science Seeing Red: Test Your Anger Knowledge

      So you've been passed over again at work for that promotion you wanted. You're so angry that you can't get any more work done today, so you've come to HowStuffWorks to spend the rest of the day doing quizzes. Maybe understanding anger might help you to relax!

    • Think Fast: Test Your CPR Knowledge
      health Think Fast: Test Your CPR Knowledge

      CPR guidelines have changed over the years. Would you know what to do in an emergency? Test your skills here.

    • Building a Billion: Do you know how to make serious money?
      money Building a Billion: Do you know how to make serious money?

      Some people have a knack for making money. Everything they touch seems to turn to gold, silver or oil. Are you one of them? Could you amass a billion dollars or perhaps a tad smaller amount?

    • Test Your Real Knowledge on Fake People
      people Test Your Real Knowledge on Fake People

      We all know that if it sounds or looks too good to be true, then it probably is, whether it's a knockoff Coach bag (the real ones have serial numbers) or that new hot girl you met online (is she really that beautiful?). Can you tell the difference between a real person and a fake one online?

    • Quiz: What goes on in your brain when you're attracted to someone?
      science Quiz: What goes on in your brain when you're attracted to someone?

      The beginning stage of romance, when you're attracted to someone and can't get thoughts of him or her out of your head, is a roller coaster of emotion. But how much do you really know about the science of attraction and new love? We'll find out in this quiz.

    • Nanogenerators: Tiny Tech, Big Questions
      electronics Nanogenerators: Tiny Tech, Big Questions

      Nanogenerators can turn subtle body movements like your heartbeat into power for electronic devices. Think you have what it takes to power through our nanogenerator quiz?

    • Are you a lock-picking expert?
      home Are you a lock-picking expert?

      If you find yourself locked out of your house, you might be tempted to learn your way around a lock pick. But while the theory is easy, getting a lock to open without a key is a little harder.

    • Fact or Fiction: Motorcycle Gangs
      auto Fact or Fiction: Motorcycle Gangs

      Since at least the 1960s, outlaw motorcycle gangs like the Hells Angels, the Outlaws and the Mongols have ruled the roads. The FBI considers OMGs to be some of the most dangerous organized criminal syndicates. Test your knowledge on the history and present day activities of these unruly riders on two wheels.

    • Girly Body Parts: Why do you embarrass me so?
      health Girly Body Parts: Why do you embarrass me so?

      Whether you or the woman in your life deals with sweating, sagging skin, a belly lapping over a belt or other joys of having a physical body in a gravity-bound world, see how much you know about causes and relief for embarrassing bodies, next.

    • Who said it: Darth Vader or Obi-Wan Kenobi?
      entertainment Who said it: Darth Vader or Obi-Wan Kenobi?

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