The scientists at the University of Cambridge say they’ve constructed a working engine a million times smaller than an ant. The prototype motor, which the physicists described Monday in the journal Proceedings of the National Academy of Sciences, relies on lasers, gold particles and the exploitation of a nifty physics principle called van der Waals forces. https://www.washingtonpost.com/news...ientists-lay-claim-to-worlds-smallest-engine/
Good grief! You'd need a million of them just to lift one bread crumb! Please Register or Log in to view the hidden image!
Nova had a series on "how to make things smaller". It has some very interesting information on the state of nano engineering.