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Have You Ever Wondered... How does a calculator work? When was the calculator invented? How big were the first calculators?
Have You Ever Wondered... What is the strongest muscle in your body? Which muscle works the hardest? Where is the largest muscle in your body?
What Is Humidity?Try It Out Ready to get some hands-on experience with humidity? Find a friend or family member to help you explore one or more of the following activities: Spend some time watching ...
How Hot Is the Sun?T he sun that heats our planet and brings life to everything on Earth is a big ball of gas. Those gases are mostly hydrogen and helium, but the sun also contains small amounts of ...
Have You Ever Wondered... How did the months of the year get their names? Have years always started in January and ended in December? What is the Gregorian calendar?
How Do Mirrors Work?W ould you believe that mirrors have been around since the beginning of time? It's true! The first human beings ever to look into a calm, dark pool of water saw their reflections.
Today’s Wonder of the Day was inspired by Nya. Nya Wonders, “How do car brakes work” Thanks for WONDERing with us, Nya! If a deer runs out in front of your car, though, you might start thinking about ...
Have You Ever Wondered... What is four-wheel drive? What's the difference between front-wheel and rear-wheel drive? How did the Jeep get its name?
What Does Mayday Mean?Mayday! Mayday! Mayday! Wonderopolis needs your help! Will you respond? Ask a friend or family member to help you explore one or more of the following activities: We're not stuck ...
Are Horses Predators or Prey?I n every ecosystem, there is a complex set of relationships between species. It is a simple fact of life that some species eat others. Those that do the eating or hunting ...
Today’s Wonder of the Day was inspired by Victoria. Victoria Wonders, “How was Wonderopolis created?” Thanks for WONDERing with us, Victoria! Calling all Wonder fans—today’s Wonder is for you! If ...
How Do We Wonder?C alling all Wonder fans—today’s Wonder is for you! If you’re here, you already know how much you can learn and how much fun you can have on Wonderopolis. But have you ever wonder ...