Wonderopolis
  • What is Fermat’s Last Theorem?
  • Who was Pierre de Fermat?
  • What is a mathematical proof?
Find it out

A mathematical proof is . . .

Test your knowledge
  • Do hummingbirds really hum?
  • How fast do hummingbirds flap their wings?
  • Where do most hummingbirds live?
Find it out

Hummingbirds can fly up to how many miles per hour?

Test your knowledge
  • How many people are on Earth?
  • What are the most populous countries in the world?
  • What will Earth's population be in 2100?
Find it out

The world population moved from six billion to seven billion in a period of about how many years?

Test your knowledge
  • What is a sari?
  • How long have people worn saris?
  • How many ways can you wrap a sari?
Find it out

This Wonder is mainly about . . .

Test your knowledge
  • Why do leaves change color in autumn?
  • Why do trees have leaves?
  • What effect does the weather have on leaf colors?
Find it out

Chlorophyll makes leaves appear what color?

Test your knowledge

Where are You Wondering?

Discover Wonder Hotspots nearby and join!

Wonderopolis
EXPLORE WONDER HOTSPOTS

What Are You Wondering?

Join in the Wonder Creation

Make YOUR wonder a wonderful reality!

279,188

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

Latest from the Wonder Bank

  • What is piragua?
    Wonder
    Published as Wonder of the Day #2812
  • how one dollar bill were made
    Micah
  • why is music such a popular topic
    jakob
  • why does when reading in dim light hurt your eyes
    sebastian
  • Who created the fire alarm
    Daxon
  • what are the best strategys in hockey
    luke
  • why do bubbles pop?
    Maria
  • what basically is Greek mythology
    David
  • i wonder why cats dont like dogs for a while until they have been with them for a long time
    Landon
  • Why do people have nightmares?
    Sylver
  • How do tornaoes form
    chace
  • When is the bed made
    Sophia
  • Why does lightning happen?
    Lily
  • How and when were the first volcanoes created
    Julia
  • why is there no cure to canser
    destini
  • why do you hold hands
    Shirley
  • Why do you fall in love
    Marinette
  • How do computers work?
    Julia
  • What do blind people see?
    Benny
  • is dance a real sport
    shirley
  • Why do people have crushes?
    Marinette
  • What Happended To DB Cooper?
    Andrew
  • how do hurcainnes get there name?
    aiyana
  • Why am I a god at Roblox?
    Carla
  • Why do people have crushes?
    MaKayla
  • how are glasses lens made?
    Paige
  • Why/ how do people come of with random names for things like a pencil?
    Shoto
  • Why do we need air to breath
    Katsuki
  • how do you get to heven
    Hailey
  • how is viruses created
    Hailey
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 MATH: Math, Numbers, Unsolved Math Problems, Number Theory, Pierre De Fermat, Sir Andrew Wiles, and more

Wonderopolis #9

How Can Math Help You Cook?

Renowned American chef Julia Child once said, “I’m very happy . . . if I can influence anyone to keep in the kitchen and make it a real family room and part of your life.” Does that statement ring tru...

Wonderopolis #162

What Is Pi?

Before we can learn more about pi, it will help if we review a bit of geometry. In particular, we need to brush up on circles. Why? Well, we’ll get around (pun intended!) to that in a second . . .

Wonderopolis #190

What Is a Prime Number?

Have you ever eaten prime rib? Maybe you've lucked into a prime parking spot near the front of the store? Have you ever primed a pump? What about priming the walls before painting them?

Wonderopolis #224

What Is Infinity?

Do you know of anything that goes on and on? The school day may seem to last forever, but it does have an end! Mathematicians have a special word for things that go on forever. It’s called “infinity.“

Spread the Joy of Wonder

Wonderopolis Widget

Interested in sharing Wonderopolis® every day? Want to add a little wonder to your website? Help spread the wonder of families learning together.

Add widget

Wonderopolis Partners & Sponsors

×

Spread the Joy of Wonder

Wonderopolis Widget

Interested in sharing Wonderopolis® every day? Want to add a little wonder to your website? Help spread the wonder of families learning together.

Add widget