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Wonderopolis

Why Do People Say “A Dime A Dozen”?

Smiles are a dime a dozen in Wonderopolis, but they don’t cost a thing! Get ready to explore the wild world of idioms.

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Why Do People Say “A Dime A Dozen”?
Who Was Clara Barton?

Do you believe in angels? Join us in Wonderopolis today to meet the woman Civil War soldiers called “the angel of the battlefield.”

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Who Was Clara Barton?
Who Was Joseph Haydn?

Where has this great Wonder of the Day been HAYDN?

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Who Was Joseph Haydn?
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?
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?