The assertion made by the “Does God Exist” people is that a pattern must be designed, and that patterns don’t occur in nature. But it is possible that there is another way to look at this.

Like, the Fibonacci sequence is the natural outcome of common aspects of additive growth, or of packing.

Plants do not know about this sequence – they just grow in the most efficient ways. Many plants show the Fibonacci numbers in the arrangement of the leaves around the stem. Some pine cones and fir cones also show the numbers, as do daisies and sunflowers. Sunflowers can contain the number 89, or even 144. Many other plants, such as succulents, also show the numbers. Some coniferous trees show these numbers in the bumps on their trunks. And palm trees show the numbers in the rings on their trunks.

Why do these arrangements occur? In the case of leaf arrangement, or phyllotaxis, some of the cases may be related to maximizing the space for each leaf, or the average amount of light falling on each one. Even a tiny advantage would come to dominate, over many generations. In the case of close-packed leaves in cabbages and succulents the correct arrangement may be crucial for availability of space.

(begin math pedant) It is not true that f_{n+1}/f_n is the golden mean (as he states). Rather, the golden mean is the limit of the ratios. (end math pedant)

I love how the thing ends–“are you picking up a pattern!!??” Ok, yes. There are lots of patterns in nature, and some of them are the result of mathematical laws (as this one probably is, though I don’t know enough about it to say what law it is exactly). This does not mean that god created these patterns.

I heard from a math prof I TAed for that the curve of the shell of the chambered nautilus doesn’t actually fit the Fibonacci spiral as closely as was once thought.

–“are you picking up a pattern!!??”
Yeah: everything that the Christian intellect stumbles at understanding or explaining = G-d. ( after the initial WOW!! of actually having an intellectual epiphany wears off)