Although there are many kinds of spirals, they all wrap around a fixed point at a changing distance. Two of the most common spirals are the Archimedean spiral and the golden spiral.

Spirals are found in manmade and natural objects, such as: spider webs, nautilus shells, watch springs, woven baskets, and coils of rope. Many plants and animals
grow in spiral patterns.
Wonderful winding spirals, coil round and round. Growing ever outward, clever curves surround.
Spirals
Objects Illustrating Spirals: Shells, Mola, Coiled Tray, Earring
Pattern Wizardry and the Brooklyn Children's Museum
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