Cyclones in general have the shape of equiangular spiral.
In general, Spiral-shaped growths in nature are mathematicaly equiangular spirals.
A garden snail, showing equiangular spiral.
More photos of seashells at Beautiful Seashells Exhibition.
Romanesco broccoli, exhibiting equiangular spiral and fractal geometry. ❐ Photo courtesy of Dror Bar-Natan.
A Hawaiian ferm, exhibiting Archimedes' Spiral. (photos courtesy of Dror Bar-Natan)
Great Mosque of Samarra, exhibiting Archimedean Spiral.
The neck of a unfinished violin. Source derekmccormick.wordpress.com.
Such a spiral in ornament is called a volute.
Mathematics of Seashell Shapes.
Archimedes' spiral, Clothoid, Lituus, equiangular spiral.
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