In 10-Minute-Math’s blog, Fibonacci Right Outside, the presence of the Fibonacci sequence in nature is discussed. For those who don’t know, the Fibonacci sequence is Fn=Fn-1+Fn-2 where Fo=0 and F1=1. It looks something like (0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, … ).

In the blog, 10-Minute-Math tells of how he grew sunflowers to see if their seeds actually did follow the Fibonacci sequence, or if it was just really close. To his surprise, they appeared to be a perfect Fibonacci sequence, spiraling clockwise 55 times, and counterclockwise 34 times. See the picture below.