Functioning ‘mechanical gears’ seen in nature for the first time

Previously believed to be only man-made, a natural example of a functioning gear mechanism has been discovered in a common insect - showing that evolution developed interlocking cogs long before we did.
Read more: http://www.cam.ac.uk/research/news/functioning-mechanical-gears-seen-in-nature-for-the-first-time?source=Snapzu