May 10, 2013, Issue of <I>Science</I> (IMAGE) U.S. National Science Foundation Caption The researchers' results are described in the May 10 issue of the journal Science. Credit Copyright AAAS 2013 Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.