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  What Are Phytoplankton?

  Have a plankTON of fun today in Wonderopolis!

  #2875

  What Are Phytoplankton?

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  Can We Reverse Carbon Emissions?

  The contents of this Wonder of the Day AIR pretty important!

  #2838

  Can We Reverse Carbon Emissions?

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  What Are You Made of?

  You’re the star of today’s Wonder of the Day!

  #1840

  What Are You Made of?

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  What Is on the Periodic Table?

  We believe you’ll find today’s Wonder of the Day quite element-ary!

  #1750

  What Is on the Periodic Table?

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  What Kind of Pencil Is Your Favorite?

  Sometimes today's Wonder of the Day is sharp, but other times it doesn't have any point!

  #1682

  What Kind of Pencil Is Your Favorite?

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  How Do Scientists Know How Old Ancient Bones Are?

  Today’s Wonder of the Day has been millions of years in the making!

  #1681

  How Do Scientists Know How Old Ancient Bones Are?

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  What Is Fertilizer?

  We believe today’s Wonder of the Day will really grow on you!

  #1661

  What Is Fertilizer?

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  Who Decomposes the Decomposers?

  Join us in Wonderopolis today for a look at the bottom of the food chain!

  #1617

  Who Decomposes the Decomposers?

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  What Is the Space Needle?

  Today’s Wonder of the Day features one of the sharpest landmarks in the Pacific Northwest!

  #1613

  What Is the Space Needle?

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  What Are Fossil Fuels?

  Today’s Wonder of the Day is a real gas!

  #1427

  What Are Fossil Fuels?

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  What Is Gasoline Made of?

  We believe you’ll think today’s Wonder of the Day is a real gas!

  #1402

  What Is Gasoline Made of?

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  How Does Carbon Paper Work?

  We hope you enjoy today’s old-school Wonder of the Day!

  #1381

  How Does Carbon Paper Work?

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  Why Do Things Melt When They Get Hot?

  Be careful! Today’s Wonder of the Day is red hot!

  #1380

  Why Do Things Melt When They Get Hot?

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  Why Do We Need To Breathe?

  Today’s Wonder of the Day is a real breath of fresh air!

  #1348

  Why Do We Need To Breathe?

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  How Hot Is the Sun?

  We hope you’re a big fan of today’s Wonder of the Day. Try to stay cool if you can!

  #332

  How Hot Is the Sun?

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  Which Came First: Checkers or Chess?

  Join us in Wonderopolis today for a look at the origins of two of the world’s most popular board games!

  #1227

  Which Came First: Checkers or Chess?

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  How Does a Submarine Work?

  You don’t have to go 20,000 leagues under the sea to experience life on a submarine. Just head over to Wonderopolis and let’s dive in!

  #1183

  How Does a Submarine Work?

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  How Cool Are Caves?

  Today’s Wonder of the Day is really cool. How cool? Read on to find out!

  #1095

  How Cool Are Caves?

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  What Is the Hottest Planet?

  Does the cool fall air make you long for summer's return? If you lived anywhere else but Earth, you'd reconsider.

  #1077

  What Is the Hottest Planet?

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  How Big Is Your Carbon Footprint?

  Today’s Wonder of the Day is for all you citizens of Planet Earth!

  #932

  How Big Is Your Carbon Footprint?

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