The Fibonacci series of numbers is at the heart of Nature.... The Fibonacci Sequence is a simple series of numbers: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, ... The next number is found by adding up the two numbers before it. The 2 is found by adding the two numbers before it (1+1) Similarly, the 3 is found by adding the two numbers before it (1+2), And the 5 is (2+3), and so on! Example: the next number in the sequence above would be 21+34 = 55 It is that simple! Here is a longer list: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181, 6765, 10946, 17711, 28657, 46368, 75025, 121393, 196418, 317811, ... If you multiply a fibonacci number by 1.618 you will get the next in the series. This proportion of 1.618 is known as PHI. I teach this to my classes...everything is in a fibonacci number like 3 or 5...see this apple core? or this passionflower? or this shell? bu...