Teeqoz on 05 February 2016
I remember reading about this exact discovery (by the same people) two years ago 
(source)
http://www3.imperial.ac.uk/newsandeventspggrp/imperialcollege/newssummary/news_16-5-2014-15-32-44
Also they didn't "discover" it per se, they just figured out a way to do it, we already knew it was possible.
EDIT: Seems like the article you posted is also in fact about 2 years old, slowpoke
