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  Why Does Hair Turn Gray?

  There’s nothing black and white about today’s Wonder of the Day!

  #6

  Why Does Hair Turn Gray?

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  Why Do Birds Fly in a V?

  What’s that up in the sky? Is it a plane? No, it’s today’s Wonder of the Day!

  #28

  Why Do Birds Fly in a V?

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  Can You Travel the World Without Leaving Home?

  Today's Wonder of the Day will have you traveling all over the world...without ever leaving home!

  #10

  Can You Travel the World Without Leaving Home?

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  Where in the World Is Kolkata?

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

  #2022

  Where in the World Is Kolkata?

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  Who Painted the Sistine Chapel?

  Today’s Wonder of the Day will have you looking for art in the most unusual of places!

  #23

  Who Painted the Sistine Chapel?

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  How Many Hot Dogs Can You Eat In 10 Minutes?

  We sure hope you’re hungry. Today’s Wonder of the Day is sure to fill you up!

  #273

  How Many Hot Dogs Can You Eat In 10 Minutes?

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  What Is a Prime Number?

  Today’s mathematical Wonder of the Day may have you counting 2, 3, 5, 7, 11, 13, 17, 19, 23, 29…

  #190

  What Is a Prime Number?

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  How Far Can a Paper Airplane Fly?

  Spread your wings and take flight with today’s all-new Wonder of the Day!

  #626

  How Far Can a Paper Airplane Fly?

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  How Many Is a Googol?

  If you’re searching for clues about today’s Wonder of the Day, just cool your engines and read on!

  #411

  How Many Is a Googol?

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  How Does the Binary System Work?

  We need help deciphering today's Wonder of the Day—it's all ones and zeroes!

  #1869

  How Does the Binary System Work?

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  Why Should We Remember the Alamo?

  We wish we had already told you about today’s Wonder of the Day, because we need help remembering!

  #508

  Why Should We Remember the Alamo?

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  What Is a Palindrome?

  No matter which direction you read it, today’s Wonder of the Day is all the same!

  #101

  What Is a Palindrome?

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  What Is an Eagle?

  Fore! With a stroke or two of luck, today’s Wonder of the Day will soar like it has wings.

  #189

  What Is an Eagle?

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  Where Is the Largest Library in the United States?

  Be sure you “check out” today’s Wonder of the Day!

  #568

  Where Is the Largest Library in the United States?

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  Who Are the Rockettes?

  You’re sure to get a big kick out of today’s Wonder of the Day!

  #1943

  Who Are the Rockettes?

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  What Is Ramadan?

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

  #308

  What Is Ramadan?

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  How Tall Is the Washington Monument?

  We cannot tell a lie. Today’s Wonder of the Day is really, really tall.

  #429

  How Tall Is the Washington Monument?

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  How Were Birthstones Chosen for Each Month?

  Enjoy your visit to Wonderopolis today as we examine some precious stones!

  #1211

  How Were Birthstones Chosen for Each Month?

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  Do You Prefer Carats or Karats?

  We believe you’ll think today’s Wonder of the Day is pure gold!

  #868

  Do You Prefer Carats or Karats?

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  What Was the Lewis and Clark Expedition?

  Pack your bag for a long journey. Today Wonderopolis goes exploring with two pioneers who blazed a new path west!

  #223

  What Was the Lewis and Clark Expedition?

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