Fibonacci sequence appears quite commonly in nature. For example, the Fibonacci sequence can be found in the shell of a nautilus and the spiral of a hurricane. We've known about the Fibonacci sequence for thousands of years, dating back to ancient Sanskrit texts. And it's related to various things like rabbits breeding, computer science, and even the seeds of a sunflower. The sequence is described by the formula Xn+2 = Xn+1 + Xn, and the ratio between consecutive Fibonacci numbers approaches the golden ratio. There are various examples of the Fibonacci sequence in nature, such as in the arrangement of seeds in a sunflower, the growth of branches in plants, and the family tree of bees. But not all patterns in nature are necessarily tied to the Fibonacci sequence, and there are misunderstandings about its presence in some art and architecture. November 23 is designated as Fibonacci Day. By RobertLamb & JesslynShields. Translated by Meyare. Reviewed by Xiaoxian.Originally from the WeChat public account: Institute of Physics, Chinese Academy of Sciences (ID: cas-iop).