Living Material (1 of 2) (image) Cell Press Share Print E-Mail Caption This photograph shows green photosynthetic cyanobacteria growing and mineralizing in the sand-hydrogel framework. The living material has similar strength to cement-base mortar. Credit College of Engineering and Applied Science at Colorado University Boulder Usage Restrictions Credit Required. Share Print E-Mail 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.