Planthopper
A group of small sap-sucking insects found on crops such as rice, treated as a major pest in agriculture.
Nymphs of the planthopper have actual gear-like teeth on their hind legs. When jumping with 400G in 2 milliseconds, the gears synchronize both legs within 30 microseconds. Adults lose the gears—damaged ones can't be replaced—and switch to friction instead.
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