The Fibonacci Sequence

# Fibonacci and the Golden Ratio

A sequence where each number is the sum of the two preceding ones: 0, 1, 1, 2, 3, 5, 8, 13...

## The Golden Ratio (Phi)
As the sequence progresses, the ratio of successive terms approaches approximately 1.618.

## Natural Occurrence
- **Phyllotaxis**: The arrangement of leaves on a stem.
- **Spiral Galaxies**: The shape of cosmic structures.
- **Shells**: The growth of the Nautilus shell.