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Fractal bacteria

Petri fractals

Pruned has collected some lovely petri dish scenes full of fractal patterns.

Billions and billions of bacterial landscape architects pruning — no less in environments poisoned with antibiotics — other bacterial landscape architects, dead or alive, to form dazzling arabesque parterres. The self-organizing embroidery of organisms in constant Darwinian mode.

More here. See also ferrofluid.