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"Issus coleoptratus is an unlikely hero, but one whose jumping prowess could revolutionize ballistics and spring-loaded machines. [...] In Science, Malcolm Burrows and Gregory Sutton (of the University of Cambridge and University of Bristol, respectively) describe a mechanism on the hind legs of a jumping insect that can only be described as a gear, cogs and all.
Although the structure had been seen before, their investigation of its action, using high speed cameras, has revealed its function: the first known case of an intermeshing gear mechanism that was not cast or forged, but that had evolved."
