<i>Science</i> Cover (IMAGE) U.S. National Science Foundation Caption The research team's results are described in the Feb. 22 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.