Have You Ever Wondered... What is a Rube Goldberg machine? Who was Rube Goldberg? Why are Rube Goldberg machines so fascinating?

Why Are Rainforests Important?Have You Ever Wondered... Why are rainforests important? What is the canopy? How much rain do rainforests get every year?

Have You Ever Wondered... How does a species become endangered? How many species are on the endangered species list? What can you do to help protect endangered species?

Today’s Wonder of the Day was inspired by Tripp. Tripp Wonders, “ Who Was Leonidas? ” Thanks for WONDERing with us, Tripp!

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 ...

Have You Ever Wondered... How much water is in a watermelon? Are all watermelons round? How far can you spit a watermelon seed?

Have You Ever Wondered... How do scientists explore the solar system? What unmanned probe has visited Saturn? Are all telescopes on Earth?

How Did April Fools' Day Begin?I f you see footage of penguins flying, check your calendar. There's a good chance it's April 1! The first day of April each year is celebrated as April Fools' Day ...

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 ...

Who Was Grace Lee Boggs?W e learn in school about historic U.S. figures who fought for social and civil rights. Dr. Martin Luther King, Jr., Angela Davis, Malcolm X, and Rosa Parks were all famous for ...

Have You Ever Wondered... Why do cats love catnip? Are there any other uses for catnip? What effect does catnip have on humans?

Today Wonderopolis is exploring the tradition of the quinceañera. Put on your party shoes and join us as we celebrate this very important sweet 15.