what is it? 24

Here's another photo for you. Can you guess what this could be?
It’s a wheel! Well done if your guess was correct! 
 

wheel

DID YOU KNOW?

Humanity had to wait until the Bronze Age, around 3,500 years ago, to witness the invention of the wheel in ancient Mesopotamia. This might come as a surprising fact considering how important the wheel is for the transportation of food, commodities, and eventually people.

Copper and other materials were used to build the wheel axles. The wheel-and-axle concept was simply genius, and the axle had to be of perfect diameter to create a nice balance between friction and load support. Smoothness and roundness were also very important for the wheel to turn. All these components are so inter-connected and complex that many anthropologists suggest that the wheel could not have been invented in phases. It must have been created all at once.

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