The reason why the wheel is a relatively late invention is inseparable from the natural environment where the ancestors lived. Ten thousand years ago, most of the land was covered by glaciers. If there was anything that could be called a "vehicle" at that time, the honor would have been sleds. In the jungles and deserts, the wheels have no practical value-even if they have appeared, they are eliminated by the intestinal paths and rolling quicksand hidden by the dense forest. The Aztecs in Central America have never used wheeled vehicles. Interestingly, they have made a large number of animal clay sculptures with four wheels.
Another example is the Eskimo. They live in the snow and ice, not only do they have no suitable roads, but they also lack wood. Obviously, the wheel cannot appear in this environment.
In other regions, wheels did not first appear as vehicles. A car-shaped pottery cup unearthed from a Hungarian tomb in 2900 BC and cultural relics from other parts of the world show that wheeled vehicles were only used for ceremonial and ceremonial occasions.
Even if there is a vehicle, it is useless to have no suitable animal power. The lack of horses to move vehicles was also one of the factors that restricted the Aztecs from inventing the wheel. As far back as 15,000 BC, hunters in the Stone Age put a bridle on horses. At that time, humans had just domesticated horses.