Physicists led by Johannes Roßnagel 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.

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 ...

An incredible new engine is powered by just a single calcium atom, and by being so small it can run more efficiently than scientists had previously believed possible. Share on Facebook (opens in a new ...