Facebook's $38-a-share initial public offering raised $16 billion. That makes it the world's biggest tech IPO and the third largest one in U.S. history. Get the inside story on 10 of the world's most successful IPOs.

Do you know what it takes to build the ultimate race car? Roll up your sleeves and learn about aerodynamics, carbon fiber and engine technologies that make fast, winning machines.

In an era of constant innovation and discovery, we may not realize that most inventions take years to develop. But sometimes, all it takes is an accident. Here, 10 inventions we'd never be able to enjoy if not for an apparent mistake.

Which photos are the strangest? The funniest? The most awesome? Vote for your favorites, or submit your own photos for a chance to win an iPad on June 1.

Pop principles about love often end up on the chopping block, but classic wisdom about happily-ever-after may not be so spot-on, either. Which time-honored, love-related truisms break down when put under the microscope?

In the battles of the sexes, do brains matter? Learn about brain gender, teenage brains, aging brains and if you could function with only half of the matter between your ears.

These people aren't tied down to a desk job. If you've ever wondered how to dock a container ship, make gummy bears, certify diamonds and design hovercrafts, take a look at these videos.

Do you check your horoscope compulsively, or snort derisively at the very thought? Before you dismiss astrology as nonsense, consider this: It has a long history with timekeeping. We're happy to tell you all about it.

Not all world records involve a stopwatch. See these people cover themselves in bugs, get extreme on unicycles and create huge geysers using breath mints and soda – all for a chance at getting into the history books.

The recently reported $2 billion loss at JPMorgan was a result of risky investing in credit default swaps. While some investments consistently make money, others -- like the ones on this list -- stand a greater chance of losing it.

Astrophysicist, cosmologist, lecturer, cartoon voice actor, author, parent, grandparent -- Stephen Hawking wears many hats, and he also has a few ideas about black holes, time, aliens and wormholes.

A new AP-CNBC poll has found that 59 percent of people don't trust Facebook to keep their information private. Are these concerns valid?

What are the odds you'll be struck by lightning? Become a millionaire? Be in a plane crash? Find out with these videos.

Who was the greatest inventor of all time? Sixteen superstar inventors are battling to be the greatest inventor of all time. Vote for your favorites!

Yahoo CEO Scott Thompson resigned last weekend after it was discovered that he listed a degree on his résumé that he didn't really have. Most of us know how to write a résumé, but you'd be surprised at the unnecessary information that people place on them.

It's a bird; it's a plane; it's a stealthy military aircraft. Take a look behind the scenes at special planes and technology used in warfare and peace-keeping.

The Samsung Galaxy Tab 2 10.1 was released on Sunday, adding yet another choice to the already vast Android tablet market. With few built-in controls except for a flat touch-screen interface, tablet computers are attractive, highly portable, easy to use and just plain cool. But how do you decide which one is right for you?

Graduation is just around the corner, and many new graduates want to get out and see the world. What if you could travel the world and get paid for it? Sound too good to be true? Here are 10 careers designed to satisfy anyone's wanderlust.

What goes on inside the mind of a serial killer? What motivates a stalker? What prevents criminals from feeling remorse? Learn about criminal psychology in these videos.

Learn about the science behind surreal and supernatural phenomena, from alien hand syndrome to zombies, in these videos from Stuff You Should Know and Stuff They Don't Want You to Know.

How can meditation help a fighter? How does the U.S. Army use ancient martial arts techniques? How can basic karate moves help you defend yourself against attackers? Learn about the many martial arts disciplines in these videos.

Pisa without its precariously tilted landmark is like San Francisco without the Golden Gate or London without Buckingham Palace. Will the peculiarly enduring tower ever vanish from the Italian skyline?

Michael Phelps recently announced that London 2012 will be his last time competing in the Olympic Games. Phelps is truly an outstanding athlete -- but could his swimwear be partially responsible for his record speeds?

We tend to think of rain as simply a part of life -- certainly nothing to fear. But when that rainfall gets out of hand, the rising waters can be deadly. Watch these videos to see daring rescues and the tragic aftermath of extreme floods.

It's hard to believe that we're the only life-form in this vast universe, and scientists are fervently seeking proof of other life-forms. Watch these videos to learn about the technologies used to track down Earth-like planets, and find out what clues we've already found.

A bad contractor may try to pull the wool over your eyes in a number of ways -- by buying shoddy materials, then pocketing the remainder of the dough you gave him for quality materials, for example. What signs should tell you it’s time to take action?

Google has acquired a license to operate self-driving cars -- just one of the technologies on our list. One down, four to go. What else is in store for future cars?

Whether it’s the flexible straw or the search engine, every invention has a story. Get a closer look at the inventors responsible from everything to dishwashers to dynamite in this animated series by HowStuffWorks.com.

Whether predator or prey, every wild animal on the planet faces a daily struggle for survival. Check out this series to learn more about the lives of everything from crocodiles to ocelots.

Albert Einstein discovered that time is relative, meaning that when objects travel at, or close to the speed of light, distances stretch and time slows down. Learn more about light, time, mass, energy and the very fundamentals of the universe in these videos.

From religion in space to digital immortality, the future is full of profound challenges and astonishing opportunities. Join the staff of HowStuffWorks.com as we explore some of the most promising -- and perplexing -- global issues of the future.

They're sexy, they're striking and they're often weird: Concept cars. Get a close-up look at some of the latest and greatest concept cars in this episode.

Whether they're covering sharks or space rockets, you can count on the Mythbusters team to get to the bottom of every myth. Tune in to this playlist to learn more about mythbusting.

Can women be pick-up artists? How can you tell if someone's trying to pick you up? Join Ben Bowlin and Cristen Conger, host of Stuff Mom Never Told, as they take a closer look at the strange world of pick-up artists.

What happens when people believe they've been abducted by aliens? Can people return from the dead? Learn more in this playlist.

Does intelligent life exist on other planets? The universe is a big place and it's easy to argue that there are bound to be other creatures out there. But what if you met one?

Riding mile-high waves alongside wild sea creatures, these surfers are true adrenaline junkies . Grab your board and catch a wave with these exciting surfing videos.

If you're like most people, one million dollars would permanently change your life. So how do you get it? Listen in for first-hand accounts from millionaire entrepreneurs.

Learn about the science behind surreal and supernatural phenomena, from alien hand syndrome to zombies, in these videos from Stuff You Should Know and Stuff They Don't Want You to Know.

As fears of diminishing oil resources grow, companies, consumers and governments across the planet search for the next source of global fuel. But what will it be, exactly? Check out this playlist to learn more.

Learn all about government and economic concepts, From microloans to corporate personhood, with these videos from HowStuffWorks.

Whether covering the Civil War or conspiracies to kill Adolph Hitler, the Unsolved History series takes a closer look at some of history's greatest enigmas.

Monsters. Rainbows. Magnets. Volcanoes. Kids love 'em. (We do, too.) These videos showcase a variety of wild, weird and fascinating topics to make your offsprings’ jaws drop.

The Hubble Space Telescope has been doing laps around the Earth every 90 minutes since 1990. How does NASA control the Hubble telescope, and what does the future hold as Hubble nears retirement?

Travel with the hosts of The Coolest Stuff on the Planet as they take on the most famous sites in Central and South America, from Lake Titicaca to Machu Picchu.

Have you caught the DIY bug? Whether you're new to the fix-it-up game or an old hand at around-the-house construction, you'll find this playlist chock-full of tips on everything from insulation to flooring.

Can humans cause earthquakes? What the heck is alien hand syndrome? Join Chuck and Josh as they explore the some of the coolest (and weirdest) Stuff You Should Know in their television shorts on Science.

Could you survive sleeping overnight in a freezing snow bank? What would you do if you found yourself floating naked on the open sea? Learn how to survive almost any environment in this playlist.

We tend to think of rain as simply a part of life -- certainly nothing to fear. But when that rainfall gets out of hand, the rising waters can be deadly. Watch these videos to see daring rescues and the tragic aftermath of extreme floods.

Mutants aren't just a comic book invention. Check out this playlist for a closer look at real-life mutations.

Why do married couples look alike? What causes the itching sensation? Learn the answers to these questions and more with these videos from Stuff You Should Know.

From UFOs to psychic powers and government conspiracies, history is riddled with unexplained events. Get a closer look at the Stuff They Don't Want You to Know in these videos.

How do personal satellite assistants work? What's the next step in artificial intelligence? Tune in to learn the answers to these questions and more in this playlist by HowStuffWorks.com.

James Bond is about as iconic as a movie (and book) character can be. Agent 007 sure has plenty of fans who seem to know a lot about him, so let's see how you do here on the ultimate Bond quiz.

There's no need to do any globetrotting to explore the regions of the Earth and to test your knowledge about the far corners of the world: You can do it with our geography quiz.

Celebrity deaths and autopsies are usually big in the news. So how much do you know about famous deaths? Take the celebrity deaths quiz and see.

While diesel earned itself a bad reputation for spewing soot in the early days, improvements have made it much cleaner. Test your knowledge of all things diesel with this quiz.

If you love to camp out but can't stand the thought of being away from the Internet for any length of time, this quiz is for you. Test yourself to see how much you know about finding mobile hotspots, boosting your wireless signal and using equipment that will keep you connected, even in the most remote regions.

The cost of airfare shouldn’t keep you home-bound. Do you know how to time your travels to save cash on your adventures?

If you've ever eaten food, then there's a chance you might have tried Spam. We're not talking about the e-mail version. We're talking canned meat. Take our Spam quiz to see where you rate on canned pork knowledge.

Throughout history, wars have decimated civilizations, torn apart families and left sickness and chaos in their wake. So when the world's leading practitioners of war get together and ban a particular method of waging it, you know it's something really bad, like chemical and biological warfare.

Lost cities have captured the imagination of many poets, film producers and story tellers. It will never be known if some of the lost cities ever existed, yet there is clear evidence as to the existence of other lost cities. If you would like to know more about a few of the most famous lost cities, have a go at this 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). That makes this a superhero quiz! Test your knowledge of superhuman ability while we stretch your brain to the limits. Pow! Kunk! Whap!

Whether it's a natural world wonder or the site of a historic event, millions of people each year travel from all over the world to visit these interesting places. Test your knowledge on the landmarks that draw the world's biggest crowds.

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.

Unless a vehicle is entirely electric, a combustion engine is under the hood of every car, truck and SUV, but how many people really know how one works? Do you know a spark plug from a fuel injector? Test your knowledge in our engine quiz.

When TV sets made their way into American homes in the 1940s, it marked a cultural transformation. According to the Bureau of Labor Statistics, Americans spend more than half their leisure time watching television. So what have we been watching all these years?

Everyone loves getting bumped up to first class or a room with a view and a hot tub, but these upgrades can be hard to come by. Do you know how to get hotel and airline upgrades? Take this quiz and find out!

So, you think you know your power tools? You would never confuse a disc sander with a random orbit sander, right? Show your stuff. Read our descriptions of these power tools and see if you can figure out what we're talking about.

Since its popularization during the 1990s, the Internet has become a big part of many of our lives. But it's changed a good deal since then -- has your Internet savvy kept up with its evolution?

No matter what your financial situation, it's important to start saving for retirement if you haven't already. On top of savings, retirement means your Social Security and Medicare benefits kick in, and you'll most likely want to take full advantage of those. Think you're hip to everything there is to know about retirement? Take this quiz to test your retirement savings know-how.

About 60 million years ago, something happened to wipe dinosaurs off the face of the Earth. These creatures dominated the landscape far longer than humans have been around, but many mysteries remain about their appearance, physiology and eventual extinction. So which of today's animals evolved from dinosaurs?

Are you a science fiction fan? Do you know where your towel is? Can you make the Kessel Run in less than 12 parsecs? Strap on your jetpack and grab your raygun, because it's time to see how much you really know about science fiction gadgets.

In tough economic times, we all start to look at trimming our expenses. Take the budgeting quiz to find out how savvy you are with your money and get a few money-saving tips along the way.

Apple Inc. is no mere computer company, thank you. It's a way of life. If you consider yourself a true "Apple person," take this quiz and find out how much you really know.

So, you pride yourself on math proficiency and an intimate knowledge of Wookiee mating rituals. But do you really know everything there is to know about nerd culture?

George W. Bush and Barack Obama obviously have strong differences of opinions about many, many things. But check out these quotes about economic matters -- could it be that these two aren't as far apart as we think?

From Grand Prix dirt bikes to high-end models with built-in navigation systems, motorcycles appeal to a wide range of folks. All you easy riders rev up your engines and test your knowledge with the motorcycle quiz.

The United States spends a sizable chunk of its national paycheck on debt obligations. Where is all that money going?

These days, digital cameras allow amateurs to produce stunning photos worthy of the pros. But it takes more than a fancy camera to create a great photograph. What are some photography techniques everyone should know?

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?

Countries around the world, collectively, have run up at least $40 trillion in debt, but some are worse off than others. Which nations have the largest slices of that massive debt pie?

Do you know the different types of computers? Take a look at our list of 10 types of computers and learn about laptops, wearable PCs and more.

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

Most of us leave the house every day to go to work and make money. But some people have found a way to run their own Internet business from home. You can do it, too.

The characters in "Star Trek" get to wield all kinds of high-tech gadgetry. Some of these gizmos are purely science fiction. What technologies have actually come to pass?

Bridges carry cars, trains, bikes and people across areas they couldn't otherwise traverse. These 10 may even move your soul with their engineering ingenuity and beauty. So which 10 make the cut?

How did a college dropout go on to start a world-renowned tech company and become the world's richest man in the process? The story is fraught with half-truths and myths, and we debunk five of them here.

Thanks to a booming technology industry that caters to people on the go, the comforts of home may soon take a backseat to their travel alternatives. What gadgets should you bring on your next road trip?

Over the centuries, some of the most breathtaking buildings on Earth have been restored many times. Whether repairs were needed, designs were updated or needs changed, big bucks were spent to make them happen.

Games like chess and checkers have been around for centuries for a reason: They're very easy to learn, but difficult to master. What other games make the cut for this list?

There may be no greater tribute to a society's ingenuity and vision than the Great Pyramid of Giza in Egypt. What other cool stuff did the ancient Egyptians invent?

You might be surprised at the tricks burglars may use to break in to your home. Not because they're so cunning, but because they're really quite simple. What should you be on the lookout for?

Whether you're discovering the big city on foot and need a bite from the taco stand, or you've driven 300 miles and crave a good diner, we’ve got 10 foods made for the side of the road.

It's actually fairly rare that a car's engine suddenly stops working altogether. Usually there are warning signs to indicate engine trouble is on its way. But what are the signs?

Three things make books rare and valuable: supply, demand and condition. Most book collectors seek out works like the ones on this list because of their associations with famous authors, events and historical periods. Of course, some book lovers want them because they're really, really old.

Each September, Americans remember the document that Revolutionary War general and national assemblyman Marquis de Lafayette called "little short of a miracle." But what don't you know about the U.S. Constitution?

Thanks to the digital age, people who love the written word have more options than ever. Which apps should book lovers download to get their literary fix?

The U.S. president rakes in a salary of $400,000 and lives in a 132-room mansion. With a full-time pastry chef and private cinema at his or her disposal, the leader of the free world wants for nothing. Which of the perks are the priciest?

Whether you're frightened or fascinated by insects, you can probably agree they don't belong in your home. But how can you keep something so small from worming its way into your walls?

There are a lot of ways to die. Some are just more interesting than others. For example, death by deodorant, or death by underwire bra.

You don't look fat in those pants. I didn't copy off his paper. She's a natural blonde. I am not a crook. Lots of us lie, but what are the biggest fibs ever told?

If you're the lone survivor of a plane crash on a deserted island or if your car breaks down on the way to grandma's, what scary medical conditions could come your way?

As housing prices rise and people become more concerned about their environmental footprints, green construction has been gaining popularity. So what are some unique, eco-friendly alternative housing ideas?

When it came to building or improving things, the ancient Romans really knew their stuff. Which cool engineering tricks did they pass along to us?

Become one of the rich and powerful as you buy and sell land, turn bungalows into five-star hotels and build specialty shops. Get the tourists to visit, provide entertainment and stay on track with employees and supplies.

In this addictive picture puzzle game, you’ll be presented with pieces of a larger image, which you’ll then have to click and drag to the right spot. The more accurate you are, the higher you’ll score. Are you and your eagle eyes ready to play?

With extra Blitz and Tourney modes, 28 trophies, medals, achievement cups and three difficulty settings, becoming Emperor of Rome will lavish you with exhilarating rewards.

Bella and Coyote Cub are two drifters who stumble across an abandoned mining town. Restoring a town while dealing with a rowdy group of desperadoes can be challenging! Join Bella and Coyote Cub on this amazing journey.

Save the family farm in Farm Frenzy 3 -- American Pie, and ranch your way through the American heartland!

Imagine a sunny clearing in the woods surrounded by lush trees and a pleasant lake. Here is where you will build the wonderful town of your dreams. Use five fabulous power-ups, rotate the boards and watch as your town comes to life.

Join Holly in 70 wonderful levels to make brides and grooms happy. Help wedding guests prepare by dressing them, picking out jewelry, styling their hair and more. Once you find the right approach to each customer, your efforts will be rewarded with generous tips.

With these free jigsaw puzzle games, you won't have to worry about losing a piece under the dining room table.

Quick, take a mental snapshot! Can you recall and reproduce the pattern that you just saw? The Memory Matrix game will put your attention span and intelligence to the test. Exercise your mind and play Memory Matrix!

The new puzzle classic returns with yet another twist!

This brand-new version of classic solitaire action offers an exciting new experience to those familiar with other renditions of the game.

Market your products, down to the color and style of packaging. Are you prepared to roll up your sleeves and harvest the fun? Play Fruits, Inc.!

Build a colorful fantasy world by gathering magic orbs in Dreamsdwell Stories, a fun match-three game with a twist.

Featuring more than 40 challenging levels, original game play and gorgeous full-screen graphics, Treasures of Montezuma is a bold adventure of strategic surprises like you've never seen before.

An ocean liner gets caught in a fierce storm and goes down, leaving a group of passengers to fend for themselves on a nearby tropical island. To get back home, you'll have to find answers and overcome more than 200 diverse quests. Can you make it through?

The Scruffs have enlisted your help to save their beloved family home from being sold. Help the Scruffs stave off this looming family crisis and uncover the secret that will change their lives forever.

Are you ready for a classic crossword challenge? Online Crossword: Regular provides beginners with game play that will surely satisfy your puzzle craving.

The Guardians of the Elements have turned away from the kingdom and allowed a banished wizard to spread corruption and fear. With eight different modes, an amazing storyline and gorgeous graphics, this magical quest will leave you breathless as you prove that this wonderful realm deserves a second chance.

Volcanoes are pressure valves that release energy from deep within Earth. Learn about different types of volcanoes and create your own virtual volcano with the Volcano Explorer.

As head of safari parks around the world, it's your job to show visitors the time of their life. Take care of these wildlife enthusiasts and give them an experience they will never forget as you guide past crazy monkeys, rebellious rhinos, hilarious hippos and more! Manage the day-to-day operations of the wildlife parks in 70 charming levels.