SPIRALS / LOGARITHMIC GROWTH-PACKING
SPIRALS / LOGARITHMIC GROWTH-PACKING
System notes
Growing systems pack outward from a center and settle on one angle (the golden angle) across botany, meteorology, astrophysics, marine biology, sensory physiology, and fluid dynamics.
Douady and Couder demonstrated in 1992 that oil droplets repelled from a magnetized center spontaneously settle into Fibonacci spirals from local repulsion alone, with no global blueprint.
The golden angle (137.507764°) is the most irrational number and produces optimal packing efficiency (~0.81) for equal disks in an unbounded domain because no two elements ever line up.
The galactic spiral claim is weaker than the biological claim because galactic spirals are density waves (stars orbit through a standing pattern), not growth patterns from a center.
Evidence ledger 6 · tier-ranked · API
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