Have you ever looked around when driving, and seen all the wheels? Everywhere you look there's wheels spinning on cars, trucks, buses, and shopping carts. I think we take the wheel for granted, but depend on them heavily. Without them nothing would move in our world.
Some author wrote about the ten most important inventions of mankind and the wheel wasn't one of them. I was surprised at first, but now think that it wasn't really an invention but something that just is. It can't be expressed mathematically so it must have an element of mystery to it. I don't understand how the wheel works in theory, but grasp some of it from watching them move.
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