Japanese scientists have developed a one of its kind fuel for powering their 'M.Mobile' motor. This motor uses gliding bacteria, which travels on an inorganic silicon track and pushes a silicon dioxide rotor. The combination takes advantage of the precise engineering of synthetic devices along with the efficient energy conversion and potential for self-repair of biological systems.

Yuichi Hiratsuka and his colleagues used a species if bacteria called Mycoplasma mobile to power this micromechanical motor M.Mobile. These bacteria, which has a micrometer-
Sized cell body glides continuously over solid surfaces and can move up to the speeds of 5 micrometers per second.
What makes these bacteria glide is not yet known, but as long as they are powering a motor who cares...!
via: physorg