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. 2014 Nov 4;5:5119. doi: 10.1038/ncomms6119

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(a) Schematic drawing of Purcell’s scallop with reciprocal motion1. (b) 3D model of the submillimetre size ‘micro-scallop’. (c) 3D model of the centimetre size ‘macro-scallop’ for quantitative comparison with theory.