Nautilus shell cut in half

Nautilus shell cut in half. The chambers are clearly visible and arranged in a logarithmic spiral.


"There is no such thing on earth as an uninteresting subject; the only thing that can exist is an uninterested person."

- Gilbert Keith Chesterton (29 May 1874 – 14 June 1936)





Source:  http://en.wikiquote.org/wiki/File:NautilusCutawayLogarithmicSpiral.jpg