Chemists at Tufts University say they’ve created an electric-driven motor that’s the size of a single molecule. It would take 60,000 of these engines to equal the width of one human hair. 

- Now they’re frantically working on creating a dip-stick tiny enough to check the engine’s oil. 

- The trouble is, you have to use the Hubble telescope when you want to “take a look under the hood”.