Wonderopolis
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  • What is pickleball?
  • Who invented pickleball?
  • What are the rules of pickleball?
Find it out

Why isn’t pickleball an Olympic game yet, according to this Wonder?

Test your knowledge
  • How loud are cicadas?
  • Why do cicadas emerge every 17 years?
  • What is the life cycle of the cicada?
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Which is NOT part of the life cycle of a cicada?

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  • Where is Proxima Centauri?
  • What kind of star is Proxima Centauri?
  • Could Proxima Centauri B support life?
Find it out

What type of star is Proxima Centauri?

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  • What does it mean to retire?
  • How can people prepare for retirement?
  • What do people do in retirement?
Find it out

In the United States, the traditional retirement age is ______.

Test your knowledge
  • What is trigonometry?
  • What are sine, cosine, and tangent? 
  • How do you find sine, cosine, and tangent?
Find it out

Which mnemonic can help you remember the formulas of sine, cosine, and tangent?

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273,582

...Questions in the Wonder Bank and counting! Here are the latest...

Latest from the Wonder Bank

  • Why do some animals bite and chase us?
    Mia
  • Who Came Up With Fidgets?
    Sasha
  • Why does chewy gum loose its flavor?
    Sasha
  • is it bad luck to open an umbrella indoors?
    Mikhayla
  • Why Do Schools Have Dress Codes?
    Mikhayla
  • Who Invented Schoool?
    Kingson
  • Who came up with WIFI?
    Mikhayla
  • what is a cold
    EllaJay
  • Is a coconut a fruit, seed or nut?
    Margaret
  • Where is the seed of the coconut?
    Margaret
  • When is the world going to end and how?
    liam
  • Who created computer programming and why?
    Aiden
  • how to make a vet business
    Elizabeth
  • What is bubblegum made of
    Keaton
  • How to make bubble gum
    Keaton
  • What makes dogs socially familier with humans?
    Divyam
  • how old is the world
    emma
  • Why do football players wear equipment
    D.K.
  • What are EXOPLANETS???
    Leandro
  • why are people raciest
    Alaster
  • why do we do school and homework?
    Alaster
  • How is Egypt like?
    Pavly
  • why do we need food and water
    Karli
  • could a zombie disease ever become real?
    Connor
  • how do water slides work
    terryn
  • I WONDER HOW DID HUMANS COME TO BE.
    Keerthi
  • How are you faster or slower?
    clarie
  • why do we have to breath
    frank
  • How are clocks made
    cash
  • why do bees buzz
    ChanningB
View all questions in the Wonder Bank

Top Nominated Wonder Questions:

  • +58

    Why do Olympians bite their medals?

    Sam — Glen Allen, VA

  • +50

    What causes blindness?

    Katherine — Owatonna, MN

  • +46

    How does weeds grow?

    Rafiul — Sydney, AL

  • +38

    How many animals are on earth?

    helaina — clearwater, FL

  • +35

    Why does a slinky get tangled so easily and is so hard to untangle?

    Terry — Garner, NC

  • +34

    Why do we procrastinate?

    Evan

Vote for wonder nominees

Explore the World of Wonders

Discover the latest Wonders from ARTS & CULTURE: Arts And Culture, Entertainment, Sports, Game, Pickleball, Tennis, and more

Wonderopolis #23

Who Painted the Sistine Chapel?

What would you do if someone asked you to spend the next four years working with your arms raised above your head? Sounds like a form of medieval torture.

Wonderopolis #27

What Would You Do on a Staycation?

You don't have to travel to an exotic land or make reservations at a fancy hotel to take your family on an overnight getaway once the weekend rolls around. There's plenty of adventure to be had just b...

Wonderopolis #14

Why Does Jell-O Jiggle?

Over the course of his life, Peter Cooper built a very diverse resume. A former presidential candidate and designer of the first steam locomotive, Cooper also held the first patent for the manufacture...

Wonderopolis #15

Why Do Superheroes Have Secret Identities?

What's that? Up there in the sky! Is it a bird? Could it be a plane? No! It's Superman! He's coming to save the day. Criminals and villains had best beware. Superman will not tolerate any evil shenani...

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