Whatever you want to call it, of all the many signs and symbols this is perhaps one of the most exciting, occuring in the natural world in the most unexpected of places.

If you clench your **hand**, tucking in your index **finger** into the base of your **thumb** and wrapping the thumb in tight, you create the golden section.

The **spiral** shapes of shells and ammonite fossils, and the seed heads of sunflowers all obey its mathematical rules. Beautiful patterns of unfurling fronds of the **tree** fern found in Maori art are another example. The series of numbers called the **Fibonacci sequence** provides a sort of *instruction manual* for the construction of this never-ending spiral shape

Technically, the golden section is described as any point on a line that divides that line in such a way that the smaller part is in the same proportion to the greater part, as the greater part is to the whole.

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