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![](http://upload.wikimedia.org/wikipedia/commons/thumb/0/08/NautilusCutawayLogarithmicSpiral.jpg/360px-NautilusCutawayLogarithmicSpiral.jpg)
Credit: Chris 72
A logarithmic spiral is a special kind of spiral curve which often appears in nature. This is a cutaway of a Nautilus shell showing the chambers arranged in an approximately logarithmic spiral.
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