Najle says crochet is the perfect medium for representing fractal structures because its surfaces can be subdivided again and again by varying the length of neighbouring crochet lines . . . The sculpture comprises crocheted squares, each of which has an individual pattern modelled by Najle, who generated 1664 different diagrams pinpointing the intersections of the woollen strands, the crochet knots that are key to its structure.
To see more pictures, go to Le Labratorie's blog, here. More about the exhibit (which apparently includes experiments with different yarns) can be found on New Scientist, here.
(Originally found via io9)