OK, this one is science/math. What is the mathematical formula that describes the spiral of a snail shell? (Hint: It also describes many other spirals in nature.)

### Answer:

The Fibonacci sequence is named after Leonardo of Pisa. He was also called Fibonacci (son of bonacci). It is a sequence of numbers that stars with 0 and 1. From there, each new number is the sum of the last two. 0+1=1. 1+1=2. 1+2=3. 2+3=5. And so on.

It is related to the Golden Ratio, which rounds off to 1.6. This ratio applies to many things in nature, from the branching of trees to the geometry of crystals, from the spiral of a snail shell to the structure of a pine cone.

That same ratio is important in music, art, photography, architecture, and even in our perceptions of beauty.

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