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Wonderopolis

Where in the World Is Kolkata?

Join us in Wonderopolis today for a visit to one of the most populous countries in the world!

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Where in the World Is Kolkata?
What Is a Spit Valve?

We don’t mean to toot our own horn, but we think today’s Wonder of the Day will be music to your ears.

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What Is a Spit Valve?
Who Is Uncle Sam?

Today’s Wonder of the Day features everyone’s favorite uncle!

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Who Is Uncle Sam?
What Is Ramadan?

Join us today when we’ll learn about a religious holiday that’s celebrated by millions of people around the world!

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What Is Ramadan?
Can People Save Endangered Species?

Careful! You’re EN DANGER of gaining new knowledge from today's Wonder of the Day!

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Can People Save Endangered Species?
What Is Autism?

Today's Wonder of the Day takes a look at a spectrum of great Wonder Friends!

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What Is Autism?
How Do Mood Rings Work?

We hope you’re in the mood for an interesting Wonder of the Day today!

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How Do Mood Rings Work?
Who Is Billie Jean King?

We hope this Wonder is to your liKING!

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Who Is Billie Jean King?
Who Was Lou Castro?

Today’s Wonder of the Day is sure to be a home run!

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Who Was Lou Castro?
How Do You Use a Laser for Eye Surgery?

In today’s Wonder, learn about a female inventor who helped some blind people see again.

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How Do You Use a Laser for Eye Surgery?
How Did the British Save Children From the Nazis?

Today in Wonderopolis, read more about people who were KINDER and saved children from the Nazis.

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How Did the British Save Children From the Nazis?
How Big Can a Dog Get?

Today’s Wonder is PAW-fect!

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How Big Can a Dog Get?
Who was Queen Elizabeth II?

Come WONDER with us today about British royals.

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Who was Queen Elizabeth II?