Scientists in the U.K. have discovered the first living creature known to have a functioning gear as part of its anatomy. This unique creature is an adolescent issus, a kind of planthopper insect and one of the fastest accelerators in the animal kingdom.
This obviously has huge implications for bike riders, mechanical engineers, entomologists, and gear heads of all descriptions. Read much more on the Popular Mechanics website, including videos and more electron micrograph images of the gear. Wow.