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

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!

Today’s Wonder of the Day was inspired by Joni from Wareham, AL. Joni Wonders, “ What is an oxymoron? ” Thanks for WONDERing with us, Joni!

Have You Ever Wondered... Why do airplanes leave tracks in the sky? What are contrails? How do pilots use planes to write in the sky?

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 ...

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 ...

Today’s Wonder of the Day was inspired by WonderFriend. WonderFriend Wonders, “What Is a Multiple?” Thanks for WONDERing with us, WonderFriend! So, what is a multiple? You’ve probably learned ...

Today’s Wonder of the Day was inspired by Nolan. Nolan Wonders, “Why do sharks live in salt water?” Thanks for WONDERing with us, Nolan! One other really important difference between sharks is where ...

Today’s Wonder of the Day was inspired by Michael. Michael Wonders, “What is the slowest shark in the world?” Thanks for WONDERing with us, Michael! As scientists continue to study these unusual ...

Have You Ever Wondered... How many sharks are in the ocean? How many different species of sharks are there? What is the largest shark?

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 ...