Kaya Identity (IMAGE) Cell Press Caption This figure show Kaya Identity relationships in two time periods: 2008-2015 and 2015-2040. Credit John Deutch / <i>Joule</i> Usage Restrictions Credit Required. 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.