0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144… ah, we could go on and on – maybe forever – starting with 0 and 1, the next number is always the sum of the last two. The Fibonacci sequence is naturally-occurring in the whorls of flower petals and pine cone seeds (count them!) and the distribution of leaves around a stem and branches around a tree. In fact, Nature is full of rough logarithms, from the spirals of seashells to the shapes of hurricanes and our own Milky Way.
Printed in Portland, OR