Spirals in Nature
Low pressure system over Iceland.
Image from NASA, taken on .
image source
Cyclones
in general have the shape of
equiangular spiral.
A cut-away view of the
Nautilus
shell.
Photo by “Chris 73”.
image source
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.
2048×1536
Photo courtesy of Dror Bar-Natan.
A Hawaiian ferm, exhibiting
Archimedes' Spiral.
(photos courtesy of Dror Bar-Natan)
Man-Made Spirals
Great Mosque of Samarra, exhibiting Archimedean Spiral.
The neck of a unfinished violin. image source
Such a spiral in ornament is called a volute.
See Also
Mathematics of Seashell Shapes.
Archimedes' spiral,
Clothoid,
Lituus,
equiangular spiral.
Graphing Calculator
