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      How Fluid Concrete Works

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      Stuff You Should Know at SXSW

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      10 Inventions That Changed the World

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      Who invented the Barbie doll and why?

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      Image Gallery: A Timeline of Sex

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      How the Nest Learning Thermostat Works

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      How the Grail Engine Works

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      How Class Action Lawsuits Work

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      How Weatherproof Speakers Work

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      How Becoming a Movie Director Works

      Director Stanley Kubrick, acclaimed for films such as "Dr. Strangelove," "The Shining," and "2001: A Space Odyssey," died on March 7, 1999. What does it take to follow in his cinematic footsteps?

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      How much actual money is there in the world?

      Carlos Slim, head of the Mexican telecommunications giant America Movil SAB, was recently announced as the richest man on Earth, with a net worth of $68.5 billion. How much money is left for the rest of us?

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      Love in the Lab: Top 5 Historical Discoveries About Sex

      As science advanced from philosophy to empirical knowledge, groundbreaking discoveries -- like the five on this list -- revealed a lot about the reproductive equipment inside human bodies. Which revolutionized our understanding of sex the most?

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      What is Google Wallet?

      Regular wallets are sooooo 2012. Could their digital doppelgangers be just around the corner?

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      Is chocolate really good for me?

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      5 Things You Must Bring to Your Tax Preparer’s Office

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      Does juggling exercise your brain?

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      Got a flat? How quickly could you change a tire?

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      Everyday Science: Volcano Quiz

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      Tech Test: Is your computer secure?

      Computers can make life easier, but they also can put your private information at risk. Find out how much you know -- or don't know -- about computer security by taking our quiz.

    • Stuff You Should Know's Mafia Movie Quiz
      Stuff You Should Know's Mafia Movie Quiz

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      Quiz: Know your Frankenstein pop culture?

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    • Tech Talk: RAM Quiz
      Tech Talk: RAM Quiz

      How much RAM is in your computer? Do you need more? And if you do, how do you know? Take the quiz to learn everything there is to know about RAM.

    • DIY: Could you build your own house?
      DIY: Could you build your own house?

      As the saying goes, home is where the heart is. But just how does one go about building a home in the first place? Find out some fun facts about this detailed process by taking the quiz.

    • Stuff You Should Know's Spam Quiz
      Stuff You Should Know's Spam Quiz

      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.

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      What are the best- and worst-paying jobs?

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      Internet Myth, Internet Truth

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      Quiz: In the Mind of a Serial Killer

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

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      The Ultimate Hydraulic Machines Quiz

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      Tech Talk: Internet Cookie Quiz

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      Stranded: Can you survive?

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      Game On! Football Quiz

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      Fact or Fiction: The World's Most Expensive Bathroom Fixtures

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      Fact or Fiction: Hollywood vs. History

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      Alpha, Beta or Gamma? This quiz is nuclear radioactive!

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      Stuff You Should Know's Nicotine Quiz

      If you're an American and you're reading this, then there's about a 30 percent chance you're addicted to nicotine. If you listened to this podcast, then you should have no problem scoring well.

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      10 Scientists Who Were Their Own Guinea Pigs

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      10 Historically Inaccurate Movies

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      Top 10 Moments in Space Bathroom History

      When you think about space travel, you don't usually take time to wonder how astronauts go to the bathroom. However, the annals of aeronautic history abound with tales of space bathroom mishaps. Here are 10 of our favorites.

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      10 Costly Food Recalls

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      10 Longest-running TV Shows

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      Top 10 Survival Tools

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      10 Most Expensive Classic Cars

      Gentlemen, start your checkbooks! These classic cars each have a history all their own and a price tag to blow your mind. The starting point is $6.9 million if you want one of these beauties parked in your garage.

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      Top 10 Improvements in Engine Design

      For more than 150 years, automotive engineers have been continually working on ways to improve the internal combustion engine. What are some of the biggest improvements they’ve made?

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      10 Off-the-wall iPhone Apps

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      5 Post-shuttle NASA Programs

      By the time space shuttle Atlantis touched down after its final voyage in July 2011, a major shift in strategy for space exploration was already under way. What are NASA's newest programs?

    • The Top 10 Game-changing Military Technologies
      The Top 10 Game-changing Military Technologies

      These 10 technologies changed war and the course of history as we know it. Some of these battlefield innovations, like adding grooves to gun barrels, are surprisingly simple. So what else made our list?

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      10 of the World’s Most Infamous Cults

      Maybe you've heard about Kool Aid or the Family Jams -- but what do you really know about some of the world's most infamous cults?

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      10 Remarkable Exoplanets

      There's a lot more out there than our measly solar system, and astronomers are becoming more adept at finding those worlds all the time. Here are 10 of their coolest discoveries.

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      Top 10 Most Popular Infomercials

      Who can forget all of the famous pitch lines, gizmos and unintentional hilarity packed into late-night paid programming? Infomercials are showy, earnest and often outright deceptive. What are 10 of the best?

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      Top 10 Mind-bending Strategy Games

      Some of the best strategy games -- those that require thinking rather than luck or physical ability -- have been around for centuries, while others have been released in the past decade. Which ones stand out from the pack?

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      10 High-paying Dirty Jobs

      These jobs probably weren't on your list of what you wanted to be when you grew up. But now that you're in the rat race, you may wonder if a dirty job is more profitable than your desk jockey career.

    • 10 Tips for Staying on Budget
      10 Tips for Staying on Budget

      You have a big expense coming up. You need a better car or home, or you want to go back to college. What do you do? Borrow, borrow, borrow -- right? Well, maybe not. Working off of a budget just may save your sanity -- and credit.

    • 10 Most Stressful Jobs in America
      10 Most Stressful Jobs in America

      Unemployment can cause stress, but some jobs are stressful, too. The next time you find yourself sweating over some deadline, remember that some people get paid to risk their lives -- or save the lives of others -- every single day.

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      Top 10 Appliances We Can't Live Without

      In a pinch, you could probably do without most of the appliances in your home -- but would you want to? Life would certainly be different without these 10.

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      5 Events Guaranteed to Crash Twitter

      When a bunch of Twitter geeks get excited about the same thing at the same time, their chatter can crash the whole service. And that's when the dreaded Fail Whale appears.

  • Social Stuff from the HowStuffWorks writers and editors

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    • Word Bubbles
      Word Bubbles

      The Word Bubbles Game will challenge your verbal agility and put your vocabulary and memory to the test. How many words can you come up with? Exercise your mind and play Word Bubbles today!

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      Arctic Tri Peaks Solitaire

      In this version of the classic solitaire game, you play through a mountain of cards, eliminating them as you go.

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      Sudoku Ultra

      Other sudoku games will let you use cheats, either with or without a penalty. But this game is a different story: one with no cheats!

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      Mahjongg Dimensions

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      Bookworm

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      Bike Build Game

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      Podcast Word Search

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      Monkey Gems

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      Spliterature

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      Alu's Revenge

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      Word Grid

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      Zuma's Revenge!™

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      Carniball

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      Kritter Krawler

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      Letters from Nowhere

      Visit an old cemetery, a provincial town and other unlikely locations to discover more of these strange letters. With puzzling mini-games, four special help tools and an extra quest to unlock a second mode, you'll be thrilled for hours playing Letters from Nowhere.

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      Roads of Rome 2

      Travel through strange new environments, overcome natural disasters, and help appease the gods and their demands. If you succeed, Caesar will be grateful and the gods are sure to smile down on the citizens of Rome.

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      Addiction Solitaire

      Find out why this speedy variant of a classic card game is called "Addiction Solitaire."

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      Mystery of Mortlake Mansion™

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      Crossword: Master

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Everyday Science: Landfill Quiz
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Everyday Science: Landfill Quiz
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stuff of the day

Did you know: Terminal velocity for a human is approximately 124 mph (200 kph) To reach this speed, you would have to fall from a height of at least 158 yards (144 meters) -- about one and a half football fields. Another random fact

“Politics in the middle of things concerning the imagination are like a pistol shot in the middle of a concert.” Who said it?