It is common in various photographic compositions, design concepts and buildings, and there are also many natural "golden spirals" in nature, such as the spiral contour of shellfish, the contour of sunflower and the Milky Way.
The drawing rule is to draw a 90-degree sector in a rectangle with Fibonacci numbers as sides, and the connected arcs are Fibonacci spirals. It comes from FibonacciSequence, also known as the golden section sequence. There are many Fibonacci spiral patterns in nature, which is the most perfect classic golden ratio in nature.
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In fact, there are a lot of beautiful and magical natural gold spiral structures in nature, which is a subtle design of nature. The picture shows the Fibonacci spiral of the Milky Way, which also perfectly conforms to the shape of the "golden spiral".
Even succulents like aloe will take on a "golden spiral" shape. Plants grow new cells in the form of "golden spiral", and then they will take on this shape. In this way, the new leaves and old leaves of plants will not block each other too much, and they can enjoy the sunshine and rain and dew to the maximum extent.
The evidence that cactus presents a "golden spiral" shape seems to be not obvious, but a careful observation of the needles growing on cactus shows that their arrangement is actually very similar to that of sunflowers and succulents.
Baidu Encyclopedia-Fibonacci Spiral