Why is the rainbow curved? Are the rainbows we see at the same time the same? Why are clouds and water flows described by partial differential equations? What is the relationship between lightning and Gauss theorem? It was Newton's gravity that discovered Neptune. Scientists use paper and pencil to calculate, not through telescopes. Why do sunflower and conch present the golden section and Fibonacci series? Number is the source of all things, and mathematics is the key to explore the unknown. Those creations that we think are extremely wonderful and mysterious can be explained by logic. This magical world follows mathematical principles.

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