Golden Ratio tee - In geometry, a golden spiral is a logarithmic spiral whose growth factor is φ, the golden ratio. That is, a golden spiral gets wider (or further from its origin) by a factor of φ for every quarter turn it makes.
 
Approximate logarithmic spirals can occur in nature (for example, the arms of spiral galaxies or phyllotaxis of leaves); This pattern allows the organism to grow without changing shape. Fibonacci’s spiral can be easily spotted on pine cones, seashells, sunflowers, flower petals and countless other life forms.