Scientists create a single atom engine.

[Dexter]

http://www.popularmechanics.com/science/energy/a20406/single-atom-engine-works/

Physicists have just built the smallest working engine ever created. It's a heat-powered motor barely larger than the single atom it runs on. Designed and build by a team of experimental physicists led by Johannes Roßnagel (pronounced 'Rossnahgel') at the University of Mainz in Germany, the single atom engine is about as efficient as your car at transforming the changing temperature into mechanical energy.

[alicewonders]

Interesting to think of the possible uses for that little motor.