Today's Mind-blower

10 Things Doctors Have Changed Their Minds About This Century

In the 20th century, fats were bad and women needed yearly mammograms. But in the new millennium, both have been overturned. What else don’t doctors believe anymore?

    • 10 Wrong Grammar Rules Everyone Knows

      people

      10 Wrong Grammar Rules Everyone Knows

      Will the grammar police really arrest you if you start a sentence with a conjunction or end one with a preposition? There's only one way to find out.

    • What is supersymmetry?

      science

      What is supersymmetry?

      Of all the superheroes we have in the universe, supersymmetry might be the one that will save us from total annihilation. Not because it fights bad guys, but because it just might explain how the tiniest parts of the cosmos work.

    • What if I never took a bath?

      health

      What if I never took a bath?

      Your initial reaction to the thought of no more baths may be "gross!" But there also could be more serious ramifications than an unpleasant layer of grime.

    • 10 Classic Hollywood Clichés Still Used Today

      entertainment

      10 Classic Hollywood Clichés Still Used Today

      Whether it's a case of comforting familiarity or lazy scriptwriting (or both), you'll notice that certain movie tropes pop up repeatedly – like walking away from an explosion. Here's a look at 10 of the most clichéd.

    • Is cursive writing obsolete?

      people

      Is cursive writing obsolete?

      When's the last time you wrote a cursive capital Q? Instruction in penmanship has dropped as digital communication eclipses pen and paper. But could cursive skills mean more than pretty loops on a page?

    • 10 Completely Wrong Ways to Use Commas

      people

      10 Completely Wrong Ways to Use Commas

      Commas are notoriously tricky punctuation marks, and with good reason. So how can you know if you're using them correctly? It comes down to one question: Is it essential?

    • What makes glass transparent?

      science

      What makes glass transparent?

      Here's something to consider: The place you call home likely has walls and glass windows. Both are adept at keeping rain, snow and wind from bothering you in your abode. Only one, though, allows light to enter. Why is that?

    • 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?

    • Fw:Thinking: Can Brain Implants Make Us Smarter?

      shows

      Fw:Thinking: Can Brain Implants Make Us Smarter?

      Is it possible for us to significantly boost our intelligence within a lifetime? Jonathan explores the fascinating world of brain implants!

    • Why do men have nipples?

      health

      Why do men have nipples?

      During early pregnancy, both male and female human embryos develop something called milk lines, ridges that eventually recede into nipples. Why have some species lost this unisex trait, and can human men actually produce milk?

    • How do erasers erase?

      electronics

      How do erasers erase?

      Ahhhh, the good old No. 2 pencil and its oft-used eraser. Have you ever wondered exactly what science is at work when that pink, rubbery lifesaver eradicates your blunders?

    • 10 Things You Should Never Throw Away

      home

      10 Things You Should Never Throw Away

      There are things we consciously recycle, such as used clothing, and there are things we toss without a second thought, like foil and rubber bands. But the latter have uses you may never have dreamed of.

    • 10 Historically Inaccurate Movies

      history

      10 Historically Inaccurate Movies

      These films look like blooper reels when you compare them to history books. From anachronisms to flat-out lies, creative license reigns in this list.

    • What if everyone on Earth spoke the same language?

      science

      What if everyone on Earth spoke the same language?

      Would the people of the world get along better if they spoke the same language? Or would it just be easier for us to hate each other?

    • The 10 Most Dangerous Sharks

      animals

      The 10 Most Dangerous Sharks

      The most dangerous shark is the one speeding toward you, right? But if you had to pick a shark to swim with, it wouldn't be one of these bad boys.

    • 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?

    • How Ebola Works

      health

      How Ebola Works

      Headlines about Ebola's spread through West Africa – and patients being brought to Atlanta for treatment – have people worried about the disease. But Ebola isn't that easy to get, and movies like "Outbreak" exaggerate its symptoms.

    • 10 Failed Google Projects

      computer

      10 Failed Google Projects

      Most people think of Google as a giant juggernaut of Internet success. But even the company behind the world's most popular search engine has had its share of blunders.

    • How Sleep Deprivation Works

      health

      How Sleep Deprivation Works

      You know you're not yourself when you don't get enough sleep, but what really happens to your body when the sandman refuses to visit?

    • 10 Gadgets That Really Should Be Obsolete By Now

      electronics

      10 Gadgets That Really Should Be Obsolete By Now

      Technology is ever-evolving, so gadgets that were cutting edge just a few years ago are already obsolete. Here are 10 that linger, though we'd happily eulogize them.

    • How TV Animation Works

      electronics

      How TV Animation Works

      Typically it takes nine months or more to create one half-hour of an animated show, while you can push out a live action sitcom in just a few weeks. Learn about all the steps involved in the process of making an animated TV show.

    • 10 Bizarre Treatments Doctors Used to Think Were Legit

      science

      10 Bizarre Treatments Doctors Used to Think Were Legit

      Science research often reveals the folly of what was perfectly acceptable in the past, and the practice of medicine is no exception. From tobacco smoke enemas to whirling chairs, doctors have tried almost everything to cure human disease.

    • How do painkillers know where you hurt?

      health

      How do painkillers know where you hurt?

      As children, we couldn't use fancy words to describe our scrapes, but we could point and wince, and somehow the medicine knew where we hurt. It still does. How?

    • 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 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 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.

    • 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 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 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 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.

    • 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.

    • 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 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?

    • 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 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.

    • 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 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 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?

    • 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 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?

    • 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.

    • 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?

    • 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 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 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.

    • 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 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.

    • 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.

    • 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?

    • 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 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?

    • 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?

    • 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?

    • 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?

    • 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?

    • 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.

    • 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?

    • 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 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?

    • 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?

    • 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.

    • 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 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 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.

    • 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?

    • 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?

    • 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 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?

    • 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 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?

    • 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?

    • 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?

    • 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.

    • 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.

    • 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.

    • 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.

    • 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.

    • 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.

    • 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!

    • 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.

    • 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.

    • 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.

    • 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.

    • 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.

    • 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.

    • Real Estate Pictures

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      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.

    • Green Living Pictures

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      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.

    • 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.

    • 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.

    • 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.

    • 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.

    • 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 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.

    • 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.

    • 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?

    • 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.

    • 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.

    • 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?

    • 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?

    • 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.

    • 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.

    • Rash Reasons: Common Skin Irritants Quiz

      health

      Rash Reasons: Common Skin Irritants Quiz

      Itchy, red, inflamed skin? Think you know what's causing that rash? Get out the salve and take this soothing quiz!

    • 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.

    • 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.

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

      entertainment

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

      Squared off on opposite sides of the Force, it might seem like Darth Vader and Obi-Wan Kenobi have nothing in common. One is tall, dark and deadly, and the other's, well, not.

    • 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!

    • Are you a vampire?

      science

      Are you a vampire?

      Have you been feeling a little off lately? Like maybe something's not quite right? Ordering your steaks extra, extra bloody? If you score above a 15 in this quiz, you might want to avoid holy water and garlicky foods for quite some time, or, you know, an eternity.

    • Fact or Fiction: Motorcycle Gangs

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      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.

    • 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.

    • 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.

    • 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?

    • 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?

    • 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.

    • 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.

    • 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!

    • 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.

    • 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.

    • 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.

    • 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?

    • Christopher Sholes and the Invention of the QWERTY Keyboard

      shows

      Christopher Sholes and the Invention of the QWERTY Keyboard

      Although the keys on the original typewriter keyboard were alphabetized, consumers quickly realized the swift taps of typists would inevitably jam the machine. Learn how Christopher Sholes saved the keyboard in this podcast from HowStuffWorks.com.

    • Otters: Not as Cute as you Think They Are

      shows

      Otters: Not as Cute as you Think They Are

      The cuteness of otters carries a lot of sway of on the Internet, but their adorable faces belie the ruthless, predatory and ravenous nature of the family Mustelidae.

    • Men Who Wear Skirts

      shows

      Men Who Wear Skirts

      If women can wear pants, then why can't men wear skirts? Cristen globe-trots around the world to where men wearing skirt-like garments is always in fashion.

    • Edward Leedskalnin's Coral Castle

      shows

      Edward Leedskalnin's Coral Castle

      After being jilted a day before his wedding and narrowly surviving tuberculosis, Latvian immigrant Edward Leedskalnin spent almost 30 years building Coral Castle out of huge blocks of stone. But how did he make it?

    • Why Does Hot Water Freeze Faster Than Cold Water?

      shows

      Why Does Hot Water Freeze Faster Than Cold Water?

      At first, it sounds crazy - wouldn't hot water take longer to freeze? Weirdly enough, the opposite is true. Join Lauren to learn more about a mystery that's puzzled humanity for centuries in this episode of BrainStuff.

    • Stephanie Kwolek and the Invention of Kevlar

      shows

      Stephanie Kwolek and the Invention of Kevlar

      When Stephanie Kwolek couldn't pursue a career in medicine, she took a job as a research chemist. Tune in to learn how this unplanned career led to the Stuff of Genius that changed the world and saved thousands of lives.

    • 5 Eye Myths

      shows

      5 Eye Myths

      Sure some of us use our eyes to stare meaningfully into the distance, or to watch our fellow humans make word salad on the Internet. But how much do we really know about this exquisite sensory system?

    • How Does BitCoin Work?

      shows

      How Does BitCoin Work?

      If money is only valuable when we believe in it, how much is a BitCoin actually worth? Jonathan explains the virtual currency as well as how to mine it and the risks involved in investing.

    • Why Men Have Short Hair

      shows

      Why Men Have Short Hair

      Since when -- and why -- did men begin cutting their hair short? Cristen investigates the hairy truth behind gender expression and hairdos.

    • What Happens When I Have A Hangover?

      shows

      What Happens When I Have A Hangover?

      If you've ever had a few too many beers at a party, then you've probably encountered the symptoms of a hangover -- the pulsing headache, dry mouth, nausea and more. But what's actually happening to you?

    • The Invention of Spray Cans

      shows

      The Invention of Spray Cans

      Although the idea of an aerosol spray back to the 18th century, Erik Rotheim was the first person to make a working device based on the concept. Tune in and learn how his Stuff of Genius has changed the world -- for better or worse.

    • Phobia of the Week: Belly Buttons

      shows

      Phobia of the Week: Belly Buttons

      Why are some people so afraid of the navel while others worship this symbolic little abdominal scar? From fear to fetish, learn what the human navel is all about.

    • How Do Gun Silencers Work?

      shows

      How Do Gun Silencers Work?

      Josh explains the design process behind gun silencers and how they suppress lethal weapons.

    • Why do women lie about sex?

      shows

      Why do women lie about sex?

      Why do women lie about sex? Cristen responds to a guy who thinks that women are lying when they say they don't want to have sex.

    • Does Hitting the 57 on Ketchup Bottles Really Work?

      shows

      Does Hitting the 57 on Ketchup Bottles Really Work?

      You know how ketchup doesn't move at all, but if you hit the 57 on a glass Heinz bottle it will? That's because non-Newtonian fluids and sheer fracture. Get all brainy right here.

    • Don't Be Dumb: Mike, the Headless Chicken Was Real

      shows

      Don't Be Dumb: Mike, the Headless Chicken Was Real

      There was once a chicken who survived his head being cut clean off and lived anouther year and a half, gaining six pounds and dying in a hotel room because he choked to death. It's all true and Josh spreads the Gospel of Mike in this video.

    • Philo Farnsworth and the Invention of the Television

      shows

      Philo Farnsworth and the Invention of the Television

      When Philo Farnsworth was just 14 years old, he had an epiphany that changed his life -- and ours. Tune in and learn how this former sharecropper created the modern television in The Stuff of Genius, a video podcast from HowStuffWorks.com.

    • 10 Robots With Dirty Jobs: Part 2

      shows

      10 Robots With Dirty Jobs: Part 2

      You think you’re job is dull and gross? Well, it’s time to meet some robots then. These machines toil away at some of the dirtiest jobs in the world -- tasks that most humans don't even like to think about. You ready for a little meet and greet?

    • Your Future Home Will be 3D Printed

      shows

      Your Future Home Will be 3D Printed

      A Chinese company called Winsun has used giant 3D printers to build ten houses in only a day! Are you ready to print your dream home of the future?

    • 4D Printing is the Future of Design

      shows

      4D Printing is the Future of Design

      4D printing is about using a 3D printer to produce self-reconfiguring, programmable material that intelligently arranges itself into basically any object - with no computers or electricity required. Learn about 4D printing in this Fw:Thinking video.

    • Tentacles of the Octopus

      shows

      Tentacles of the Octopus

      What do Iran-Contra, the October Surprise, surveillance software, super-spies and mysterious mafia hits all have in common? The answer might surprise you.

    • How Do Memes Work?

      shows

      How Do Memes Work?

      We hear the term "memes" get tossed around all over the internet. But what are they actually? Jonathan explains their importance to human evolution.

    • 10 Mind Blowing Sex Facts: Part 1

      shows

      10 Mind Blowing Sex Facts: Part 1

      From torture phalluses to ointment-coated witches brooms, there’s a lot about sex you don’t know about yet. Arm yourself with 10 mind-blowing sex facts to awe your friends and lovers. Here are the first five.

    • What happened to the hikers at Dyatlov Pass?

      shows

      What happened to the hikers at Dyatlov Pass?

      During the Cold War, a group of Soviet hikers disappeared in the Ural mountains. When they were finally discovered, it was clear that something had killed them -- but what, exactly? Learn more about the incident at Dyatlov's Pass in this podcast.

    • How Does Product Placement Work?

      shows

      How Does Product Placement Work?

      It takes 5 BrainStuff hosts to reveal how placing product ads in media works. Learn which one has the most integrity and which one would sell their grandmother for the right price!

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Fire Away! 'Star Wars' Missile Defense Quiz
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Fire Away! 'Star Wars' Missile Defense Quiz
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Why was President Reagan's Strategic Defense Initiative (SDI) commonly referred to as "Star Wars"?

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Did you know: Morocco was the first country to recognize the United States as a sovereign nation in 1777. Another random fact

“Success is the ability to go from one failure to another with no loss of enthusiasm.” Who said it?

poll: what do you think?

Sandals with socks: totally horrifying, or totally fine?

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