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"The Golden Mean is represented by the Greek letter phi, (with the decimal representation of 1.6180...) is one of those mysterious natural numbers that seems to arise out of the basic structure of our cosmos. Phi appears regularly in the realm of things that grow and unfold in steps just as the Nautilus shell grows larger on each spiral by phi."

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Created as part of Rafael Araujo's Calculations series, Nautilus brings the logarithmic spirals of the famous cephalopod swirling to life in a precise field of three-dimensional space. #colossal

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[Mystère #195] La turbine de Francis de la centrale d'Ardnacrusha

Ammonites' inspire the pattern of a man's power machine --- c. 1930, Spiral Steam Turbine. Sheet metal creativity!

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