Inside the mind of the octopus. Inside the mind of the octopus by Sy Montgomery Photograph: Brandon Cole.
Nature, The Golden Ratio and Fibonacci Numbers. Plants can grow new cells in spirals, such as the pattern of seeds in this beautiful sunflower.
The spiral happens naturally because each new cell is formed after a turn. "New cell, then turn, then another cell, then turn, ... " How Far to Turn? So, if you were a plant, how much of a turn would you have in between new cells?