"Copy from each other" or "convergent evolution"? Why is "wind" making car look more and more alike? 

Out of ten cars on the road, seven of them may look similar. In today's car industry, more and more cars have become similar. Some people say that this is plagiarism and imitation, while others say that this is convergent evolution. However, there is another reason that is often overlooked - that is: "wind". It is the wind that makes the cars look the same. Why are the appearances of cars getting more and more boring nowadays? How does "wind" make car designs look the same? How important is the "drag coefficient"? This video will start from the perspective of aerodynamics, and show you how the wind makes all cars look the same.
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