hence why the wheel never really evolved in nature, because legs are far more adaptable to terrain and probably easier to grow. (modern) wheels do work on rough

hence why the wheel never really evolved in nature, because legs are far more adaptable to terrain and probably easier to grow. (modern) wheels do work on rough terrain (e.g. mountain bikes) but they're highly sensitive to scale. It's possible the idea was thought of many many times but only became practical with the advent of roads.