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In page Gear:
"The gear mechanism was previously considered exclusively artificial, but in 2013, scientists from the University of Cambridge announced their discovery that the juvenile form of a common insect Issus (species Issus coleoptratus), found in many European gardens, has a gear-like mechanism in its hind legs. Each leg has a 400 micrometer strip, pitch radius 200 micrometers, with 12 fully interlocking spur-type gear teeth, including filleted curves at the base of each tooth to reduce the risk of shearing. The joint rotates like mechanical gears and synchronizes Issus's legs when it jumps to within 30 microseconds, preventing yaw rotation.[1][2][3][4]
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