The infamous Fibonacci series is recalled on this May 8th, 2013, part of the series which is constructed when each element is a sum of the previous 2 elements in the series. So 1 - 1- 2 - 3 - 5 - 8 - 13 - 21 etc. Lots of things in biology are arranged in helices, spirals, which can be described in terms of a Fibonacci series. This has been around a long time because, Fibonacci was actually Leonardo of Pisa (not of Vinci), who must have been one hell of a mathematician. This is just about all TPP knows about this other than some of the flowers whose development he has studied involve Fibonacci spirals describing the arrangement of multiple parts. Such dates don't come around very often, so glad some math geek was around to point it out.