Wonderopolis
Wonderopolis
  • 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?

Test your knowledge
  • Can you only see the Moon at night?
  • Why is it hard to see the Moon and other celestial objects during the day?
  • How bright is the Sun's light reflected by the Moon?
Find it out

The Moon is closest to the Sun during which of its phases?

Test your knowledge
  • What is a Mobius strip?
  • Who developed the Mobius strip?
  • What are the key properties of a Mobius strip?
Find it out

The Möbius strip is closely connected to what other math concept?

Test your knowledge
  • What illness did iron lungs treat?
  • How do iron lungs work?
  • Do people still use iron lungs?
Find it out

Which invention has replaced the iron lung in most modern hospitals?

Test your knowledge

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274,779

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

Latest from the Wonder Bank

  • is it true there is a pandemic every 100 years?
    Audrey
  • Who is the first person to dance
    Simran
  • How are softball and baseball fields made?
    Ellie
  • what is the difference between the house and the senate
    Luke
  • What is camouflage
    Beckett
  • What is a bestiary
    Beckett
  • how to make plant extract? How to extract the plant extract?
    İsmail
  • HOW DO PEOPLE DIE?
    pedro
  • What is the moon cycle?
    Rose
  • Why do we need schools?
    M
  • why do we die
    Molly
  • Who was the first person to make electricity?
    Kylie
  • What is the galaxy made of
    Aaradhya
  • How much money can i make an when im gonna get
    Devereaux
  • WHY DO WE HAVE TO EAT
    Madelyn
  • Why is Hawaii in the middle of the ocean
    Caitlyn
  • Why does the world feel closer then it is on a real globe
    Lance
  • what is a brain
    Jessalynn
  • What is Depression?
    Keigan
  • When is the world going to end and how?
    audrina
  • How Was God Created
    Ellanor
  • why do we say what when we heard what someone said?
    Leona
  • If we can see the sky, where is space?
    Kaitlyn
  • Do fish see water?
    Charlie
  • What if the food chain fell apart 10 years ago?
    Tait
  • if we cant see air can fish not see water?
    leona
  • How does a Grenade work?
    Ian
  • when your having fun why does time fell so short?
    tyler
  • Why Do Schools Have Dress Codes?
    xavier
  • What is the difference between a therapy animal and a service animal?
    Sophia
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 SOCIAL STUDIES: Social Studies, Money, Retirement, Career, Investment, Stock Market, and more

Wonderopolis #4

Are You a Good Observer?

Have you ever had a friend claim that he can't see the forest for the trees? If so, you may have WONDERed what this curious phrase means. If you can see the trees, how can you not see the forest?

Wonderopolis #10

Can You Travel the World Without Leaving Home?

Have you ever WONDERed what it's like to ride on a dog sled in the Arctic? Or dance the Flamenco in Spain? There are so many places to WONDER about in this great big world, and there are lots ways to...

Wonderopolis #2

How Do Streets Get Their Names?

When you hear Broadway, Abbey Road, and Bourbon Street, what comes to mind? Bright lights? The Beatles? Mardi Gras? They are some of the most recognizable streets in the world, and though you may neve...

Wonderopolis #22

How Can Spare Change Make a Big Difference?

Many children are already involved in fundraising through their schools, scouts and churches, but bringing philanthropy into the home makes giving back to your community a whole-family effort.

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