Fibonacci Numbers

The numbers written by Sauniere were discovered by Sophie to be the first 8 numbers of the Fibonacci sequence. Each number in this sequence consists of the past two numbers added together. From this the Golden ratio is found, which consists of the ratio of two consecutive numbers. This ratio has applications in real life, one of which applications is found in the spacing between petals on plants. It could be that Sauniere is referring to something natural that uses these numbers. Here is an example of the Fibonacci sequence found in nature: