Cog or toothed wheels have been credited as a man-made invention starting somewhere around 100 BC. The interlocking teeth, allowing one wheel to propel against another, led to many of man's greatest inventions for locomotion and the industrial revolution.
It turns out humans can't take exclusive credit for this invention any longer. We were beat out by a bug called Issus (similar to a grasshopper). This insect's skeleton evolved to solve a need for jumping at instantaneous, hi-speed, by developing legs with an interlocking system. How smart is that!
You know I am crazy about our bones. I got pretty juiced a couple of years ago when research came out highlighting the importantance of bones in diabetes and obesity, labeling the skeleton as part of the endocrine system.
I talk quite a lot about the way we use ourselves impacting the structure of our bones, literally reshaping them--not just the quality of their composition, such as bone mineral density. But how we now know that the bone is talking to our metabolic system. Making my work in Movement Intelligence, Bones for Life, and the Feldenkrais Method all the more important.
Anyway, you might like to see the video of the Issus in action and one of the leading Cambridge scientists in the study explaining his grandson's involvement in the discovery. It's a great video even highlighting collaboration with senior citizens and nine-year old's.