Clay Stem Cells (IMAGE) University of Southampton Caption The image attached shows gels made from clay nano particles being injected out of a needle. The gels contain smaller clay gel blobs (microcapsules). The image illustrates the ability of clay gels to hold molecules in discrete locations. Credit Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Usage Restrictions Only for this story 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.