Aryeh Warmflash, Rice University (IMAGE) Rice University Caption Rice University bioscientist Aryeh Warmflash and his colleagues have uncovered details about how embryonic stem cells respond to the collection of signals that direct their differentiation into blood, bone and tissue. Credit Jeff Fitlow/Rice University Usage Restrictions Credit must be used. 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.