I fist came across this on Engadget [1], but preferred to link to the paper.<p>[1]: <a href="http:&#x2F;&#x2F;www.engadget.com&#x2F;2015&#x2F;11&#x2F;18&#x2F;scientists-build-atom-scale-sub-that-moves-at-breakneck-speeds&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.engadget.com&#x2F;2015&#x2F;11&#x2F;18&#x2F;scientists-build-atom-sca...</a>