It seems so ordinary and simple, but it took early humans a long time to figure out the wheel from what I’ve heard and I can’t understand why.
In: Engineering
For a more serious answer. We probably had the technology to make a rough wheel for a long time. Any round-ish object will roll. Attaching that wheel to something in a useful way takes a lot more craftsmanship. A cart is a lot more complicated than a lone wheel.
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