Original press release from Drexel University: http://www.drexel.edu/now/news-media/releases/archive/2012/J... Added value in PhysOrg article: zero.
Please, everyone, stop submitting links from PhysOrg and ScienceDaily. I have never ever ever seen anything on those sites that isn't either (1) bullshit or (2) a recycled press release with zero (or often negative) added value. (Sometimes it's both at once.) It only takes ten seconds' googling to find the original source.