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