Wheel/Talk

The wheel is often viewed as the quintessential invention, and was most likely invented in all ancient civilizations, although not always used.

How true is this? From what I know, wheels as means of transportation were invented around the middle east around 4000 BC and spread outward from there. The concept is neither as obvious as one might think, nor as useful (eg without roads slider bars do a better job moving heavy things around).

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Where is the evidence of South American wheels?