Explore Wonders | Tag: axle | Wonderopolis

Explore Wonders | Tag: axle | Wonderopolis

Wonderopolis

Who Invented the Bicycle?

Once you get the hang of today’s Wonder of the Day, you’ll never forget it!

#2254

Who Invented the Bicycle?
Who Invented Gears?

Today’s Wonder of the Day really kicks things into high gear!

#2070

Who Invented Gears?
What Is a Simple Machine?

Today’s Wonder of the Day is really simple, but it does a lot of work!

#1981

What Is a Simple Machine?
Who Invented the Wheel and Axle?

There’s no doubt in our minds that today’s Wonder of the Day will get you rolling!

#1712

Who Invented the Wheel and Axle?
Who Invented the Unicycle?

Today’s Wonder of the Day takes a balanced look at what’s beyond the bicycle…

#220

Who Invented the Unicycle?