Turing Morphogenesis — Digit Formation in Limb Development ⬡ Lab #8500 Milestone

Domain width Lx: 6.0 Domain height Ly: 2.5 Activator diff. Du: 0.005 Inhibitor diff. Dv: 0.20 Feed rate f: 0.035 Kill rate k: 0.060 Pattern type: Gierer-Meinhardt Gray-Scott Color map: Bone Fire Cool Bio Speed: 5× Reset Pause Add Noise — digits

Alan Turing (1952): reaction-diffusion instability via short-range activation + long-range inhibition. Domain width controls stripe number — larger domains → more digit-like stripes. This models chondrogenic condensation in the developing limb bud (Gierer & Meinhardt 1972; Turing's morphogenetic field). Lab #8500 milestone.