The pinecone above exhibits logarithmic spirals shaped much like the number six.
For more information regarding this common number created by nature read on...

In the 13th Century AD, Leonardo da Pisa (Fibonacci) described in his book titled "Liber abaci", a series of numbers which were frequently found in nature. This number set (which include the numbers 1,1,2,3,5,8,13,21,34,55,89,144, and so on...) was formed by adding the prior two numbers in the list to form the next number (e.g. 1+1=2, 1+2=3, 2+3=5, 5+8=13, etc). For an example in nature, daisies often have 34, 55 or even 89 petals. Interestingly, if these numbers are placed next to each other as squares of proportional size and then curves drawn inside each square a familiar spiral shape is formed. See http://www.mcs.surrey.ac.uk/Personal/R.Knott/Fibonacci/fibnat.html#spiral for a detailed description and animated drawing. It is this spiral shape, that many seeds or fruits of plants (e.g. pinecones and pineapples) and animals (cross section of a Nautilus sea shell) exhibit. In fact, this arrangement occurs so frequently that the mathematical constant phi (1.618, aka the golden ratio or golden number) is derived from the Fibonacci numbers.