The Golden Mean, the perfect aesthetic ratio, can be approximated as the ratio of one Fibonacci number to the next, or about 1:1.618.
A Fibonacci number is the sum of the two previous Fibonacci numbers:
1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 610, etc.
The number of petals on a flower or pine cone is always a Fibonacci number.
